1 Corinthians 3:18

3:18 Guard against self-deception, each of you. If someone among you thinks he is wise in this age, let him become foolish so that he can become wise.

1 Corinthians 7:5

7:5 Do not deprive each other, except by mutual agreement for a specified time, so that you may devote yourselves to prayer. Then resume your relationship, so that Satan may not tempt you because of your lack of self-control.