1 Tessalonicenses 5

1 Tessalonicenses 5:23

This, therefore, is perfection in the Christian life in my judgment, namely, the participation of one's soul and speech and activities in all of the names by which Christ is signified, so that the perfect holiness, according to the eulogy of Paul, is taken upon oneself in "the whole body and soul and spirit," continuously safeguarded against being mixed with evil. — ON PERFECTION