It is better to trust in the Lord than to put confidence in man (comp. Psalms 62:8, Psalms 62:9). Israel, on its return from the Captivity, had begun by putting a good deal of trust in its human helpers, as Cyrus and the other friendly heathen mentioned in Ezra 1:4-6; Ezra 3:7.
But this help, after a little time, had failed them (Ezra 4:1-24), and they had found themselves in great difficulties.