In whatever state the soul may be, it ought to pray. A soul which is pure and beautiful must pray or else it’ll lose its beauty. A soul which is striving after this purity must pray or else it will fall again. A sinful soul plunged in sins must pray so that it might rise again. There is no soul which is not bound to pray. For every single grace comes to the soul through prayer.
--St. Faustina Kowalska