So that thou incline thine ear unto wisdom, and apply thine heart to understanding. Proverbs 2:2
I applied mine heart to know, and to search, and to seek out wisdom, and the reason of things. Ecclesiastes 7:25
Prove all things. 1 Thessalonians 5:21
Don't try to understand things.
Trust in the LORD with all thine heart; and lean not unto thine own understanding. Proverbs 3:5
It'll only get you killed.
There is a way which seemeth right unto a man, but the end thereof are the ways of death. Proverbs 14:12
Make your mind a slave of Christ.
Casting down imaginations ... and bringing into captivity every thought to the obedience of Christ. 2 Corinthians 10:5