Since the brave soldiers of faith failed to prove God´s omniscience; since the defender of the status quo and the oficial doctrines of the oficial churches failed to give you an answer...here you have some copy-paste by me.
The Bible tells us that God
does perceive all things, which means that no fact can be hidden from His knowledge. As King David recognized: “Indeed, the darkness shall not hide from You, but the night shines as the day; the darkness and the light are both alike to You” (Psalm 139:12). God sees all things, and nothing can be hidden from His knowledge—not even the secret intentions of the heart (Psalm 44:21). In fact,
He understands our own intentions better than we do (cf. Jeremiah 17:9-10; Hebrews 4:12)! As Paul explains, “there is no creature hidden from His sight, but all things are naked and open to the eyes of Him to whom we must give account” (Hebrews 4:13).
Human beings perceive through the senses, but there are limits to what the senses let us perceive and understand. But God’s senses are not limited like ours! His Spirit searches all things (1 Corinthians 2:10), and nothing is beyond God’s ability to perceive it. In this sense, He is omniscient. Nothing can escape His gaze and His knowledge. If it can be known, He knows it!
Scripture Support:
Psalm 147:4,5
He telleth the number of the stars; he calleth them all by their names. Great is our Lord, and of great power: his understanding is infinite.
Acts 15:18
Known to God are all his works from the beginning of the world.
Psalm 33:13
The Lord looketh from heaven; he beholdeth all the sons of men.
II Kings 13:19
And the man of God was wroth with him, and said, Thou shouldest have smitten five or six times; then hadst thou smitten Syria till thou hadst consumed it: whereas now thou shalt smite Syria but thrice.
Jeremiah 38:17-20
Then said Jeremiah unto Zedekiah, Thus saith the Lord, the God of hosts, the God of Israel; If thou wilt assuredly go forth unto the king of Babylon's princes, then shall this city be given into the hand of the Chaldeans, and they shall burn it with fire, and thou shalt not escape out of their hand. And Zedekiah the king said unto Jeremiah, I am afraid of the Jews that are fallen to the Chaldeans, lest they deliver me into their hand, and they mock me. But Jeremiah said, They shall not deliver thee. Obey, I beseech thee, the voice of the Lord, which I speak unto thee: so it shall be will unto thee, and thy soul shall live
Romans 4:17
(As it is written, I have made thee a father of many nations,) before him whom he believed, even God, who quickened the dead, and calleth those things which be not though as they were.
Isaiah 46:10
Declaring the end from the beginning, and from ancient times the things that are not yet done, saying, My counsel shall stand, and I will do all my pleasure.
Matthew 11:21-23
Woe unto thee, Chorazin! woe unto thee, Bethsaida! for if the mighty works, which were done in you, had been done in Tyre and Sidon, they would have repented long ago in sackcloth and ashes. But I say unto you, It shall be more tolerable for Tyre and Sidon at the day of judgment, than for you. And thou, Capernaum, which art exalted unto heaven, shalt be brought down to hell: for if the mighty works, which have been done in Sodom, it would have remained until this day.
I Samuel 23:5-14
So David and his men went to Keilah, and fought with the Philistines, and brought away their cattle, and smote them with a great slaughter. So David saved the inhabitants of Keilah. And it came to pass, when Abiathar the son of Ahimelech fled to David to Keilah, that he came down with an ephod in his hand. And it was told Saul that David was come to Keilah. And Saul said, God hath delivered him into mine hand; for he is shut in, by entering into a town that hath gates and bars. And Saul called all the people together to war, to go down to Keilah, to besiege David and his men. And David knew that Saul secretly practised mischief against him; and he said to Abiathar the priest, Bring hither the ephod. Then said David, O Lord God of Israel, thy servant hath certainly heard that Saul seeketh to come to Keilah, to destroy the city for my sake. Will the men of Keilah deliver me up into his hand? will Saul come down, as thy servant hath heard? O Lord God of Israel, I beseech thee, tell thy servant. And the Lord said, He will come down. Then said David, Will the men of Keilah deliver me and my men into the hand of Saul? And the Lord said, They will deliver thee up. Then David and his men, which were about six hundred, arose and departed out of Keilah, and went whithersoever they could go. And it was told Saul that David was escaped from Keilah; and he forbare to go forth. And David abode in the wilderness in strong holds, and remained in a mountain in the wilderness of Ziph. And Saul sought him every day, but God delivered him not into his hand.
God is the only One Who possesses limitless knowledge. The Illustrated Oxford Dictionary defines “omniscience” as “knowing everything,” and the Bible certainly ascribes omniscience to God (Psalm 139:1-4; cf. Woods, 1988, p. 34). Consider a sample of what the Bible reveals about God’s omniscience: “The eyes of the Lord are in every place, keeping watch on the evil and the good” (Proverbs 15:3). “Can anyone teach God knowledge, since He judges those on high?” (Job 21:22, emp. added). Consider a few of the implications of God’s omniscience.
God knows every past action. At times, humans struggle to interpret history because we often lack complete historical information. The eternal God, Who had no beginning, has no problems seeing clearly through the mists of time, for history is ever before Him (Isaiah 57:15). God emphasized this when He told Moses in Exodus 3:14, “I Am Who I Am.” John 8:58 reads: “Jesus said to them, ‘Most assuredly, I say to you, before Abraham was, I Am.’ ” In the Day of Judgment, we will be judged based on God’s complete knowledge of our history (see Revelation 20:12). God cannot be taught anything about the past (Isaiah 40:14).
God knows every present action. Psalm 33:13-15 reads: “The Lord looks from heaven; He sees all the sons of men. From the place of His dwelling He looks on all the inhabitants of the earth; He fashions their hearts individually; He considers all their works.” Despite the uniqueness of each person, God understands everyone individually, and knows everyone personally (see Matthew 10:29-30). God even knows everything that is done privately (Matthew 6:4), so no one can hide from God (see Kizer, 2001, p. 7). God cannot be taught anything about the present (Matthew 28:20; 1 Corinthians 4:5).
God knows every future action. The fact that God gave prophets the capability to predict accurately very specific events in the distant future is one of the great evidences for the inspiration of the Bible (Thompson, 1999, p. 19). God has emphasized repeatedly that He knows the future, perhaps never more emphatically than when Jesus Himself prophesied (see Matthew 24:1-51; Mark 8:31; John 2:19-22). The fact that God knows the future does not imply that humans somehow lose freedom of choice. Just because God knows that something will happen, does not mean that He causes it (see Bales, 1974, p. 49). God cannot be taught anything about the future (Acts 17:31; John 14:3).
God knows every human thought. King David addressed his son: “As for you, my son Solomon, know the God of your father, and serve Him with a loyal heart and with a willing mind; for the Lord searches all hearts and understands all the intent of the thoughts. If you seek Him, He will be found by you; but if you forsake Him, He will cast you off forever” (1 Chronicles 28:9). Psalm 94:9-10 reads: “He who planted the ear, shall He not hear? He who formed the eye, shall He not see? He who instructs the nations, shall He not correct, He who teaches man knowledge?” God cannot be taught anything about the content of human intellect (Acts 15:8).
God knows what humans need. Ecclesiastes 2:26 reads: “For God gives wisdom and knowledge and joy to a man who is good in His sight….” Noah of old would have perished in the Flood had God not given him a way of escape. The Israelites could not have conquered Canaan without divine guidance and protection. God has promised that He will provide for the physical needs of those who serve Him (Matthew 6:24-34). Most important, God has identified the problem of sin and death and provided the only possible solution—the blood of His Son (1 Peter 1:18-19).
God knows what is right and wrong, because He defines morality and truth—His Word is the standard for righteous judgment. Hannah wanted desperately to have a child, but she was unable to do so. In her fervent request for God’s intervention, she prayed: “…the Lord is the God of knowledge; and by Him actions are weighed” (1 Samuel 2:3). God has revealed what to do in order to please Him, and He knows of our obedience and disobedience (Proverbs 15:3).
What is the proper response to God’s omniscience? The inspired apostle Paul provided a fitting answer in Colossians 3:24: “And whatever you do, do it heartily, as to the Lord and not to men, knowing that from the Lord you will receive the reward of the inheritance; for you serve the Lord Christ.” Those who refuse to serve the Lord should be frightened by God’s omniscience, because God knows of every sin. And unforgiven sin will be punished (Psalm 90:8; Romans 6:23). For God’s children, however, the implications of God’s knowledge are sources of peace and strength (2 Timothy 2:19; 1 John 3:22; Romans 11:33). Ultimately, the God Who knows everything will judge humans based on how we use the knowledge that has been revealed to us. We must act based on our knowledge to prepare for eternity.