Well, to grow in Christ we have to get close to Him as we see from this text...

Acts 4:13
Now when they saw the boldness of Peter and John, and perceived that they were unlearned and ignorant men, they marvelled; and they took knowledge of them, that they had been with Jesus.

NKJV has it this way..

13 Now when they saw the boldness of Peter and John, and perceived that they were uneducated and untrained men, they marveled. And they realized that they had been with Jesus.


And we see this...

Colossians 3:10
And have put on the new man, which is renewed in knowledge after the image of him that created him:

2 Peter 1:2-3
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:

But always remember...
1 Corinthians 13:2
And though I have the gift of prophecy, and understand all mysteries, and all knowledge; and though I have all faith, so that I could remove mountains, and have not charity, I am nothing.

The true witness writes to the church of the last days:
"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 sup with him, and he with me. Rev. 3: 20

This is written specifically to the church. A church that thinks it is rich, and increased with goods, and needs nothing; and does not know that they are wretched, and miserable, and poor, and blind, and naked.

They know about Jesus, they know a lot of things, but they keep Jesus on the peripheral of their lives, they don't invite Him in to their lives.