Virtually all of the disciples spoken of at length in the New Testament were wrong sometimes. They were greedy, obtuse, and impulsive. Sometimes they did things we might regard as unforgivable. Really, how much difference was there between Peter and Judas for example? But Jesus saw their potential and nurtured it. He forgave their failings, and helped them to grow away from them. He will do the same for you, and you should take the same attitude toward others.