"Perfect behaviour may be as unattainable as perfect gear-changing when we drive; but it is a necessary ideal prescribed for all men"

Matthew 5:48 (KJV):"Be ye therefore perfect, even as your Father which is in heaven is perfect."

2 Corinthians 13:11 (KJV): "Be perfect, be of good comfort, be of one mind, live in peace; and the God of love and peace shall be with you."