20
To be perfectly frank, I'm getting exasperated with your infantile thinking. How long before you grow up and use your head - your adult head? It's all right to have a childlike unfamiliarity with evil; a simple no is all that's needed there. But there's far more to saying yes to something. Only mature and well-exercised intelligence can save you from falling into gullibility.
20
Dear brothers and sisters, don’t be childish in your understanding of these things. Be innocent as babies when it comes to evil, but be mature in understanding matters of this kind.
20
Brethren, do not prove yourselves to be children in your minds. As regards evil, indeed, be utter babes, but as regards your minds prove yourselves to be men of ripe years.