CAN GOD BE SEEN AND/OR HEARD?

Genesis 3:9-10 And the LORD God called unto Adam, and said unto him, Where art thou? And he said, I heard thy voice in the garden, and I was afraid, because I was naked; and I hid myself. (KJV) Genesis 32:30 And Jacob called the name of the place Peniel: for I have seen God face to face, and my life is preserved. (KJV) Exodus 24:9-10 Then went up Moses, and Aaron, Nadab, and Abihu, and seventy of the elders of Israel: And they saw the God of Israel: and there was under his feet as it were a paved work of a sapphire stone, and as it were the body of heaven in his clearness. (KJV) Exodus 33:11 And the LORD spake unto Moses face to face, as a man speaketh unto his friend. And he turned again into the camp: but his servant Joshua, the son of Nun, a young man, departed not out of the tabernacle. (KJV) Exodus 33:23 And I will take away mine hand, and thou shalt see my back parts: but my face shall not be seen. (KJV) Isaiah 6:1 In the year that king Uzziah died I saw also the Lord sitting upon a throne, high and lifted up, and his train filled the temple. (KJV) Romans 1:20 For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse: (KJV) Exodus 33:20 And he said, Thou canst not see my face: for there shall no man see me, and live. (KJV) Job 11:7 Canst thou by searching find out God? canst thou find out the Almighty unto perfection? (KJV) John 1:18 No man hath seen God at any time; the only begotten Son, which is in the bosom of the Father, he hath declared him. (KJV) John 5:37 And the Father himself, which hath sent me, hath borne witness of me. Ye have neither heard his voice at any time, nor seen his shape. (KJV) I Timothy 6:16 Who only hath immortality, dwelling in the light which no man can approach unto; whom no man hath seen, nor can see: to whom be honour and power everlasting. Amen. (KJV)

God the Father, as He exists in His spiritual form, cannot be directly seen or heard.  But God the Father can manifest Himself into a form which can be seen and heard.  He did this on several occasions in the Old Testament, leading to the claims of those who had seen Him.  He also did this, in the form of Jesus Christ, in the New Testament. Also, the Romans 1:20 passage is speaking about how things in nature are evidence of God, so it doesn't directly relate to the question. And the Job passage is something being said by Zophar in a discussion with Job, and not all things being said by people in the Bible are necessarily fact (like when Peter denied knowing Jesus, even though he did). Not a contradiction.