Christians grow in maturity, the kinds of sin that remain in their lives are often not so much sins of words or deeds that are outwardly noticeable to others, but inward sins of attitudes and motives of the heart—desires such as pride and selfishness, lack of courage or faith, laziness, lack of zeal in loving God with our whole hearts and our neighbors as ourselves, and failure to fully trust God for all that he promises in every situation.