Doctrine is important. A church should be able to give you the doctrine it teaches. It shouldn’t be necessary to write anything down, either. The doctrine should come from the book God wrote.
God’s doctrine is in His word:
My doctrine shall drop as the rain, my speech shall distil as the dew, as the small rain upon the tender herb, and as the showers upon the grass: (Deuteronomy 32:2 KJV)
Job knew his doctrine, though his friends did not:
For thou hast said, My doctrine is pure, and I am clean in thine eyes. (Job 11:4 KJV)
Solomon knew the wisdom of doctrine:
Hear, ye children, the instruction of a father, and attend to know understanding. For I give you good doctrine, forsake ye not my law. (Proverbs 4:1-2 KJV)
Isaiah speaks of doctrine, too:
Whom shall he teach knowledge? and whom shall he make to understand doctrine? them that are weaned from the milk, and drawn from the breasts. For precept must be upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little: (Isaiah 28:9-10 KJV)
They also that erred in spirit shall come to understanding, and they that murmured shall learn doctrine. (Isaiah 29:24 KJV)
Jesus’ doctrine was astonishing, but could not be refuted:
And it came to pass, when Jesus had ended these sayings, the people were astonished at his doctrine: (Matthew 7:28 KJV)
And when the multitude heard this, they were astonished at his doctrine. (Matthew 22:33 KJV)
And they were astonished at his doctrine: for he taught them as one that had authority, and not as the scribes. (Mark 1:22 KJV)
And they were astonished at his doctrine: for his word was with power. (Luke 4:32 KJV)
And, it was not the same as the religious leaders:
Then understood they how that he bade them not beware of the leaven of bread, but of the doctrine of the Pharisees and of the Sadducees. (Matthew 16:12 KJV)
And the scribes and chief priests heard it, and sought how they might destroy him: for they feared him, because all the people was astonished at his doctrine. (Mark 11:18 KJV)
The most important verse of all regarding doctrine is: Jesus answered them, and said, My doctrine is not mine, but his that sent me. (John 7:16 KJV)
So, what’s your doctrine? Mine comes from the Bible, God’s word. If it’s not in there, it’s not doctrine for me.