Isaiah prophesied that God's people were like a pregnant woman "about to give birth" (Is 26:17). Her water broke, her contractions became more frequent, and her labor pains increased, as she writhed and cried out (Is 26:17-18). Finally, she delivered. But there was no baby. She gave "birth to wind" (Is 26:18).
The point of Isaiah's prophecy is: "Salvation we have not achieved for the earth, the inhabitants of the world cannot bring it forth" (Is 26:18). In other words: "In no way can a man redeem himself, or pay his own ransom to God" (Ps 49:8). Isaiah also prophesied: "All our good deeds are like polluted rags; we have all withered like leaves" (Is 64:5). Jesus bluntly stated: "Apart from Me you can do nothing" (Jn 15:5).
We are like babies; we are totally dependent on the Lord (see Mt 18:2ff). Paul taught: "I repeat, it is owing to His favor that salvation is yours through faith. This is not your own doing, it is God's gift; neither is it a reward for anything you have accomplished" (Eph 2:8-9). "Everything is grace" (Rm 4:16).
"From His fullness have we all received, grace upon grace" (Jn 1:16, old RSV). Grace to you!