1 Tessalonicenses 5
Philoxenus of Mabbug
1 Tessalonicenses 5:16
Those who, together with labours, possess innocency of soul also, become the discoverers of the kingdom which is in them, and in its blessings they fare luxuriously and revel in continual joy, over which sorrow ruleth not, because at all times they rejoice in the gladness which is born of them, even as Paul also said, "Rejoice at all times," and in another place he also said, "Rejoice in your hope, and endure patiently your tribulations; for from the patient endurance of tribulations the hope concerning the things which are to come increaseth in us." — 13 Ascetic Discourses, Discourse 11 -- On Abstinence
1 Tessalonicenses 5:19
That is to say, do not grieve him by sin, otherwise his light will be quenched from your soul—a light which, when kindled within you, gives you the possession of a power that is beyond expression; and you will be able to contend "with principalities and powers," and fight against the evil spirits under heaven, and reject all the world with its pleasures and pains. All are effected by the fervor of the Spirit within us. — Memra on the Indwelling of the Holy Spirit