Senses trained to discern good and evil.

Hebrews 5:11-14, Concerning him we have much to say, and it is hard to explain, since you have become dull of hearing. For though by this time you ought to be teachers, you have need again for someone to teach you the elementary principles of the oracles of God, and you have come to need milk and not solid food. For everyone who partakes only of milk is not accustomed to the word of righteousness, for he is a babe. But solid food is for the mature, who because of practice have their senses trained to discern good and evil.

We have no fear of losing our salvation. We are told to work out our salvation as one thankful for being forgiven much. He wants us to grow, to mature to be able to discern good and evil!

Open my ears that I may hear; give me Your discernment of good and evil that I may be mature and be able to teach others Your wonderful ways, Lord.