Isaiah 29:9

Jerusalem’s leaders would delay (actually, "be delayed," by their lack of perception) and wait to act in faith because they were spiritually blind and drunk (cf. Isaiah 6:9-10). Isaiah was apparently speaking to them ironically again (cf. Isaiah 29:1). If the people of Jerusalem failed to see the importance of trusting God in the face of enemy attack, and failed to trust Him, they would find it even more difficult to see His will and do it later. When people see the will of God and refuse to do it, they become incapable of seeing it and doing it further (cf. Acts 28:26-28; Romans 1:24; Romans 1:26; Romans 1:28; Hebrews 4:1-11). This is serious spiritual blindness and drunkenness.