2 Peter 1:12
Wherefore I will not be negligent to put you always in remembrance of these things, though ye know them, and be established in the present truth.
As he considered the present and eternal implications of this subject, Peter determined to keep on reminding the believers of the importance of the development of Christian character. Even if we already know it, we need to be constantly reminded. It is easy for us to get distracted and forget that we are to mature in our walk with God.