Romans 2:21 You, therefore, who teach another, do you not teach yourself? You who preach that a man should not steal, do you steal?
If you are willing to teach others you must be willing to listen to the same instructions which you give to others. Failing to do so would just be silly!
How many times in our lives have we done exactly that; told people what they should be doing and then not followed our own advice?
Just because we are willing to take our faults to Christ for forgiveness does not give us the right to go off and do it all again!