1 Corinthians 14:20

Brethren, be not children in understanding: howbeit in malice be ye children, but in understanding be men.

Brothers, don't be children in thoughts, yet in malice be babies, but in thoughts be mature.

Brethren, be not children in mind: yet in malice be ye babes, but in mind be men.

Brethren, become not children in the understanding, but in the evil be ye babes, and in the understanding become ye perfect;

Brothers, stop thinking like children. In regard to evil be infants, but in your thinking be mature.