This is true, but I would add a word of caution. Note that another truth is brainwashing cometh by hearing and hearing. Be sure that as you are endeavoring to listen and study the word of God, that you aren’t actually being brainwashed by men.
My husband and I have recently realized that we were willingly and actively being brainwashed by constantly listening to recorded sermons and also reading certain books over and over again. Imagine: No one came to our house and held us captive to brainwash us. We pursued the brainwashing!
By all means possible, seek truth, but under no circumstances, believe what a man tells you just because of whom he says he is.