Gregory of Nyssa

The soul whose life is in God will find its pleasure in none of those things that are deceptively presented as something good. If that soul allows its heart to be defiled by one passion, at the same time it breaks the covenant of its spiritual marriage. And, as it says in Scripture, "Wisdom cannot enter the soul that does evil." It may, in a word, be truly said that the good spouse cannot come to live with a soul that is irascible or full of malice or that harbors any other similar defect.