1 Peter 1:13-16

So make your minds ready, and keep on the watch, hoping with all your power for the grace which is to come to you at the revelation of Jesus Christ; Like children ruled by God, do not go back to the old desires of the time when you were without knowledge: But be holy in every detail of your lives, as he, whose servants you are, is holy; Because it has been said in the Writings, You are to be holy, for I am holy.