Sure they can.
Unless you think God's grace vanished when the law was given.
The law was given for one purpose. To condemn, and being that it was the ministration of death; and ADDED to the original covenant made to Abraham, explains WHY Abraham, and those of faith looked forward to OUR day for the promise to be received.
Mixing law and grace is how every form of heresy begins.
2 Cr 3:6 Who also hath made us able ministers of the new covenant; not of the letter, but of the spirit:
for the letter killeth, but the spirit giveth life.
2Cr 3:7 ¶ But if the
ministration of death, written [and] engraven in stones, was glorious, so that the children of Israel could not stedfastly behold the face of Moses for the glory of his countenance; which [glory] was to be done away:
2Cr 3:8 How shall not the
ministration of the spirit be rather glorious?
It is only the new covenant that is the ministration of the spirit..the old covenant is the ministration of death; and only works wrath...as the bible states...there was no life in it; no promise of life. ONLY by faith and looking forward to OUR day; by PROMISE, which is the way of faith is a man given life, and even they had to wait until the death of Jesus for to receive the promise. Heb 11.
2Cr 3:9 For if the
ministration of condemnation [be] glory, much more doth the ministration of righteousness exceed in glory.
Which is why those of faith receive even better promises; that are not based on physical land, etc...or physical kings, but, on the spiritual REALITIES; witnessed through the new covenant itself...of which Paul was a minister.