Anger And Sin

Ὀργίζεσθε καὶ μὴ ἁμαρτάνετε, λέγετε ἐν ταῖς καρδίαις ὑμῶν καὶ ἐπὶ ταῖς κοίταις ὑμῶν κατανύγητε... Ταύτην τὴν λέξιν παραλαβὼν ὁ ἀπόστολος ἐπήγαγεν αὐτῇ· ̔Ο ἥλιος μὴ ἐπιδυέτω ἐπὶ τῷ παροργισμῷ ὑμῶν, μηδὲ δίδοτε τόπον τῷ διαβόλῳ. ὁ ταύτην καταδεξάμενος τὴν ἀποστολικὴν προτροπὴν ὀργισθεὶς οὐχ ἁμαρτάνει τοῦ κατ' ὀργὴν διακειμένου ἐπίμονον αὐτὴν ἔχοντος ὄν καὶ μηνιαστὴν ἔθος καλεῖν. βεβαιοῖ ταύτην τὴν νόησιν τὸ ἑξῆς ἐπιφερόμενον· Ἄ λέγετε γάρ φησίν, ὀργισθέντες δηλονότι, ἐν ταῖς καρδίαις ὑμῶν, ἐπὶ ταῖς κοίταις κατανύγητε, ὥστε ἀναστάντας ἐξ ὕπνου μηδὲν πρᾶξαι ἤ εἰπεῖν τῶν ἐν τῇ καρδίᾳ ἐν ὀργῇ διεσκεμμένων. Δίδυμος Αλεξανδρεύς, Εἰς Ψαλμούς, Ψαλμος Δ´ Source: Migne PG 39.1168a

Be angry and sin not, the things you say in your hearts, fight with on your beds... 1 This line is taken up by the Apostle when he says: 'Do not let the sun go down on your anger, do not give a place to the devil.' 2 And to receive the Apostolic admonition is not to sin because of anger when one is angered. Rather let him who is troubled by anger have that endurance that is by custom called restraint of anger. And the sense of this is confirmed a little after, for it says, 'The things you say,' clearly by those who are angered, 'in your hearts, fight with on your beds', that rising from sleep you resolve to act nothing like them, in deed or by speech in the heart, because of anger. Didymus the Blind, Commentary on The Psalms, from Psalm 4 1 Ps 4.5 2 Ephes 4.26-27