"In repentance and rest is your salvation, in quietness and trust is your strength, but you would have none of it" (Isa 30:15). "Yet the Lord longs [waits] to be gracious to you; therefore he will rise up to show you compassion. For the Lord is a God of justice. Blessed are all who wait for him!" (Isa 30:18)
Despite our refusal to trust God, yet God is gracious. In one of the greatest statements in all of Scripture, God says that since Israel will not wait for [trust in] him (Isa 30:15), he will have to wait (NIV "longs") to be gracious to them (Isa 30:18).
Man's common problem: Not waiting. This leads to making bad decisions. Then we regret as we experience undesirable results and consequences. The problem of God's people during Isaiah's time was that they could not wait on God to deliver them when they were under duress from the threat of Assyrian invasion. So they rushed off to depend on Egypt for help, which God regards as useless.