But who am I? — And, indeed, who am I? (answering to the Greek καὶ γάρ).
That we should be able. — That we should hold in: i.e., keep strength (‘âçar kôah), a phrase confined to six passages in the Chronicles and three in Daniel (Daniel 11:6; Daniel 10:8; Daniel 10:16).
All things come of thee. — For from thee is the whole (scil.) of our wealth and power. (Comp. 1 Chronicles 29:16.)
And of thine own. — And out of thine own hand.