2. Again, just men obtain from God what they merit, as we have said

above. Sinners, however, can merit nothing, since they are without grace, and even without charity which, according to the Gloss on the words, Having an appearance of piety, but denying the power thereof, is "the power of piety." And hence they cannot pray piously, which, as we have said above, is requisite if prayer is to gain what it asks for.

But though a sinner cannot pray piously in the sense that his prayer springs from the habit of virtue, yet his prayer can be pious in the sense that he asks for something conducive to piety, just as a man who has not got the habit of justice can yet wish for some just thing, as we have pointed out above. And though such a man's prayer is not meritorious, it may yet have the power of winning favours; for while merit reposes upon justice, the power of winning favours reposes upon grace.