For I have said] As he that surely believed it in heart. Mercy shall be built up for ever] Abide firm, like a strong building; not be moveable, like tents. thy faithfulnesse shalt thou establish in the very heavens] Thy promise will be performed, as sure as the heavens abide: or, thou hast shewed the unchangeablenesse of thy truth, in setling the heavens. heavens] Psalms 119:89.