Filipi 1:9-10

1:9 And I pray this, that your love may abound even more and more in knowledge and every kind of insight 1:10 so that you can decide what is best, and thus be sincere and blameless for the day of Christ,

Ibrani 5:14

5:14 But solid food is for the mature, whose perceptions are trained by practice to discern both good and evil.