John Trapp on Psalms 138:8

Verſ. 8 The Lord will perfect that which concerneth mee] Hee will not do his buſineſs to the halves, leave it in the midſt, but carry it on to a conſummation, and lay the top-ſtone of grace: this I am well aſſured of. See Phil. 1.6. Only I muſt pray, and do my part; having an eye ſtill to Gods everlaſting mercy in Chriſt.

Forſake not the works of thine own hands] Look upon the wounds of thine hands, and forſake not the works of thine hands, prayed Queen Elizabeth. And Luthers uſuall prayer was, Confirm, O God, in us that thou haſt wrought, and perfect the work that thou haſt begun in us, to thy glory: So bee it. Though the good work of grace bee begun in us, yet wee can neither perſevere in that grace, nor bring it forth to act, without new grace: Even as trees, though they bee fitted to bear fruit, yet without the influence of the heavens, they cannot put forth that fitneſſe in fruit, &c.