If I want my life to be fruitful, I must not only try to be virtuous, kind, godly, knowledgable, patient, control myself, show brotherly kindness, and love, I must diligently pursue them. That is to put every effort into making them be part of my character. Every action is to be measured by this standard.
The Holy Spirit tells us through Peter, if I don't, I am blind and have forgotten that
God purged me from my old sins (2 Peter 1:9). But if I make these part and parcel to who I am, how I respond and give every effort to act this way, then I will never fall.
Notice, he did not say I would never fail (make a mistake), but I will never fall, meaning never be away from God. God judges the heart, not just actions.