This was the only authoritatively prescribed fast known to Tertullian (De jejunio, 2, 13, 14; De oratione, 18).
It is difficult to understand a much-discussed passage of Origen (De oratione, 14), except as applying to prayer addressed to the saints.
martyres (perhaps the earliest of all), De baptismo haereticorum (now lost), De baptismo, De poenitentia, De oratione (the last three written for catechumens), De patientia, Ad uxorem Libri II., De praescriptione haereticorum, and Adv.
To learn something of his Christian temper we must read the De oratione and the De patientia.
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