Well, when you read John 6:44, it also must be read in context to how Christ draws all men unto himself (John 12:32), and it must be read in context of how the Lord is not willing that any should perish but all should come to repentance (2 Peter 3:9), and it must be read in context of when Jesus said, "Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will sup with him, and he with me." (Revelation 3:20).
When you read John 10:29, you also have to read the context of Jesus's words that say, "My sheep hear my voice, and I know them, and they FOLLOW me:"
We know this is not God forcing man against his will here because Jesus says elsewhere to come to Him.
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Come unto me, all ye that labour and are heavy laden, and I will give you rest. (Matthew 11:28).
How do we know we were transformed or regenerated? By the fact that the fruits of the Spirit are in our life. By the fact that we do not live a sinful lifestyle day in and day out. By having proper and understanding knowledge of God's Word. By loving the brethren and others.
But that does not mean believers who have partaken of Christ cannot fall away from Him. How so?
The Israelites (i.e. the fathers) who passed thru the Red Sea have drank of that spiritual Rock who was Christ.
"Moreover, brethren, I would not that ye should be ignorant, how that all our fathers were under the cloud, and all passed through the sea; And were all baptized unto Moses in the cloud and in the sea; And did all eat the same spiritual meat; And did all drink the same spiritual drink: for they drank of that spiritual Rock that followed them: and that Rock was Christ. But with many of them God was not well pleased: for they were overthrown in the wilderness."
However, we learn that they hardened their hearts in the wilderness because of the deceitfulness of sin.
"And Moses verily was faithful in all his house, as a servant, for a testimony of those things which were to be spoken after; But Christ as a son over his own house; whose house are we, if we hold fast the confidence and the rejoicing of the hope firm unto the end.
Do Not Harden Your Hearts
Wherefore (as the Holy Ghost saith, To day if ye will hear his voice,
Harden not your hearts, as in the provocation, in the day of temptation in the wilderness:
When your fathers tempted me, proved me, and saw my works forty years.
Wherefore I was grieved with that generation, and said, They do alway err in their heart; and they have not known my ways.
So I sware in my wrath, They shall not enter into my rest.)
The Dangers of Unbelief
Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God. But exhort one another daily, while it is called To day; lest any of you be hardened through the deceitfulness of sin. For we are made partakers of Christ, if we hold the beginning of our confidence stedfast unto the end;" (Hebrews 3:5-14).
Did you catch verse 14? It says we are made partakers of Christ, IF....IF...we hold the beginning of our confidence stedfast unto the end. Doesn't sound like God is over-riding anyone's "free will" here. The passage above also says to the brethren to take heed so as not to have an evil heart of unbelief and thereby depart from the living God. Hence, this is why we are to exhort one another daily against the deceitfulness of sin.
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