World Wide Study Bible
a Bible passage
Create in me a clean heart, O God,
and put a new and right spirit within me.
10. Create—a work of almighty power.
renew—implies that he had possessed it; the essential principle of a new nature had not been lost, but its influence interrupted (Lu 22:32); for Ps 51:11 shows that he had not lost God's presence and Spirit (1Sa 16:13), though he had lost the "joy of his salvation" (Ps 51:12), for whose return he prays.
right spirit—literally, "constant," "firm," not yielding to temptation.