You ought to make every effort to free yourselves even from venial sin, and to do what is most perfect.
Teresa of AvilaThe custom of speaking to God Almighty as freely as with a slave - caring nothing whether the words are suitable or not, but simply saying the first thing that comes to mind from being learnt by rote by frequent repetition - cannot be called prayer: God grant that no Christian may address Him in this manner.
Teresa of Avila