Psalms 143:1,2

In thy faithfulness According to thy true and faithful promises, made to the penitent who apply to thee for pardon and aid; answer me Grant my earnest request; and in thy righteousness Whereby thou art inclined and engaged by promise to favour righteous persons and just causes. Or, the word, here rendered righteousness, may signify mercy, as it often does; for “God's promises are only conditional, and our sins and frailties are so many, that we have always need of God's mercy to make us capable of being reputed of the number of those who have complied with the conditions annexed to the promises.” And enter not into judgment, &c. As if he had said, When I appeal to thy righteousness, I do not do it under an idea that I can justify myself upon a strict trial at the tribunal of thy justice; for I know, if thou shouldst rigorously examine all the tempers and affections of my heart, and actions of my life, I should certainly be condemned by thee to wrath and punishment; for in thy sight shall no man living be justified That is, according to thy holy and righteous law, and upon the terms of strict justice, without thy indulgence and infinite mercy. Observe well, reader, no man, in order to his justification before God, can plead innocence or his own righteousness; either that he has not sinned, or that he does not deserve to die for his sins; nor must he suppose that he has any satisfaction of his own to offer. Whoever expects to be justified, must look for that inestimable blessing, followed by peace with God, adoption into his family, and a title to life eternal, as an act of pure grace, a free and undeserved gift from the divine mercy, to be conferred upon the penitent and believing, through the redemption which is in Christ Jesus: see Romans 3:9.