Work—Prayer Is a Duty and a Discipline Prayer should be done regularly, persistently, resolutely, and tenaciously at least daily, whether we feel like it or not. “The worst sin is prayerlessness,” wrote Peter T. Forsyth. “Overt sin . . . or the glaring inconsistencies which often surprise us in Christian people are the effect of this, or its punishment. . . . Not to want to pray, then, is the sin behind sin.”