James 1:22

But prove yourselves doers of the word (actively and continually obeying God’s precepts), and not merely listeners (who hear the word but fail to internalize its meaning), deluding yourselves (by unsound reasoning contrary to the truth).  

We will succeed when we follow God’s word if we keep doing and following His instructions. God tells us to renew our minds, which keeps our minds sound and able to hear from God. When we commit to being a doer of the word, we build ourselves up in scripture, prayer, and praise, keeping ourselves from unsound truth.