The only thing I do not like about this reasoning is the implied suggestion that God cannot be understood which leads to the conclusion that God cannot be known.
I must disagree.
Jesus came to show us the Father and He did not fail.
Since He did not fail, we can know the Father and the Father can be understood.
Numerous places in the word states that we can know God, understand God, as well as know and understand His will. More than that, it states that salvation and sanctification is obtained by the knowledge of God and His will.
This all goes back (again) to the theism without Jesus. What we are hearing in these threads is the continual background noise of Christianity without Jesus. To say that we cannot know or understand the Father is to say that Jesus failed and that is a denial of His Lordship and work.
I realize people do not approach it with that idea in mind. They think they are glorifying God by saying that He is too big to be understood. But you need to read what you are saying to then measure it up to what the word says.
Did Jesus show us the Father or not?
I will simply repeat His teaching:
John 14:9-26 KJV
(9) Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then, Shew us the Father?
(10) Believest thou not that I am in the Father, and the Father in me? the words that I speak unto you I speak not of myself: but the Father that dwelleth in me, he doeth the works.
(11) Believe me that I am in the Father, and the Father in me: or else believe me for the very works' sake.
(12) Verily, verily, I say unto you, He that believeth on me, the works that I do shall he do also; and greater works than these shall he do; because I go unto my Father.
(13) And whatsoever ye shall ask in my name, that will I do, that the Father may be glorified in the Son.
(14) If ye shall ask any thing in my name, I will do it.
(15) If ye love me, keep my commandments.
(16) And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever;
(17) Even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you.
(18) I will not leave you comfortless: I will come to you.
(19) Yet a little while, and the world seeth me no more; but ye see me: because I live, ye shall live also.
(20) At that day ye shall know that I am in my Father, and ye in me, and I in you.
(21) He that hath my commandments, and keepeth them, he it is that loveth me: and he that loveth me shall be loved of my Father, and I will love him, and will manifest myself to him.
(22) Judas saith unto him, not Iscariot, Lord, how is it that thou wilt manifest thyself unto us, and not unto the world?
(23) Jesus answered and said unto him, If a man love me, he will keep my words: and my Father will love him, and we will come unto him, and make our abode with him.
(24) He that loveth me not keepeth not my sayings: and the word which ye hear is not mine, but the Father's which sent me.
(25) These things have I spoken unto you, being yet present with you.
(26) But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.
Hebrews 1:1-3 KJV
(1) God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets,
(2) Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds;
(3) Who being the brightness of his glory, and the express image of his person, and upholding all things by the word of his power, when he had by himself purged our sins, sat down on the right hand of the Majesty on high;
2 Corinthians 4:6 KJV
(6) For God, who commanded the light to shine out of darkness, hath shined in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ.
John 16:13 KJV
(13) Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.
Colossians 1:9-10 KJV
(9) For this cause we also, since the day we heard it, do not cease to pray for you, and to desire that ye might be filled with the knowledge of his will in all wisdom and spiritual understanding;
(10) That ye might walk worthy of the Lord unto all pleasing, being fruitful in every good work, and increasing in the knowledge of God;
1 Corinthians 1:5 KJV
(5) That in every thing ye are enriched by him, in all utterance, and in all knowledge;
Romans 12:2 KJV
(2) And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God.
Ephesians 5:17 KJV
(17) Wherefore be ye not unwise, but understanding what the will of the Lord is.
John 1:14 KJV
(14) And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.
2 Corinthians 4:4 KJV
(4) In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.
Colossians 1:12-15 KJV
(12) Giving thanks unto the Father, which hath made us meet to be partakers of the inheritance of the saints in light:
(13) Who hath delivered us from the power of darkness, and hath translated us into the kingdom of his dear Son:
(14) In whom we have redemption through his blood, even the forgiveness of sins:
(15) Who is the image of the invisible God, the firstborn of every creature:
2 Peter 1:2-3 KJV
(2) Grace and peace be multiplied unto you through the knowledge of God, and of Jesus our Lord,
(3) According as his divine power hath given unto us all things that pertain unto life and godliness, through the knowledge of him that hath called us to glory and virtue:
This idea that we cannot know and understand God is completely contrary to the gospel and the process delivered to us by God. It sounds very religious and sound from a theistic point of view...
But it simply is contrary to the doctrine of Christ.
Knowledge is words.
Faith comes by words (knowledge) received by Christ.
If you cannot know God, then you cannot have faith.
While it all does sound so religious... it short circuits the plan and purpose of God.
Know Jesus... you will know the Father.
He surprises me every day 
