The first aspect of common grace is what we might call negative or preventative. Its essential characteristic is that of restraint. Although the restraint that God places upon sin and its effects is neither complete (else no sin would exist at all) nor uniform (else all men would be equally evil or good), it is of such a nature that the expression and effects of human depravity are not permitted to reach the maximum height of which they are capable.
Sam Storms

Fitness

Fitness

FITNESS

BASIC R.C. BELIEF From PURGATORY, Catholic Information Society, Imp. John Whealon, page 10. “In demonstrating the reasonableness of a doctrine, theologians use what they call an `argument of fitness.’ What this means is that once a doctrine is revealed, it can be shown to be consistent with all the rest of revealed doctrine. It `fits’ in very well with God’s ways of doing things and, further, appears as `not unreasonable.’ Or to state this another way, the doctrine can be shown to be credible.”