Here, 1. David prays for sustaining grace; for this grace sufficient he besought the Lord twice: Uphold me ; and again, Hold thou me up . He sees himself not only unable to go on in his duty by any strength of his own, but in danger of falling into sin unless he was prevented by divine grace; and therefore he is thus earnest for that grace to uphold him in his integrity (Ps. 41:12), to keep him fr...