Balaam, on the other hand, made no further attempts to induce God to curse Israel, but thought he might be able to bring misfortune upon Israel by enumerating the sins they had committed in the desert, and in this way to conjure up God's wrath against them. But the desert had also been the place where Israel had accepted the Torah, hence the mention of the desert called up God's love instead of His wrath.
Balaam himself, when he let his eyes wander over the camp of Israel, and perceived how their tents were so pitched that no one might see what was going on in the homes of the others, found himself compelled to burst into praises of Israel; and, under the inspiration of the prophetic spirit, the curses he had intended to speak were changed in his mouth into blessings, and he spoke of the extent and importance of the kingdom of Israel.
But whereas Moses blessed his people in a low, quiet voice, Balaam spoke his words of blessing in a very loud voice, so that all the other nations might hear and out of envy make war upon Israel. Balaam's blessings were therefore accounted to him not as blessings, but as curses. God said: "I have promised Abraham, 'And I will bless them that bless thee, and him that curseth thee will I curse,' hence will I account Balaam's blessings as curses."
And indeed all of Balaam's blessing later turned to curses, except his blessing that houses of teaching and of prayer should never be missing among Israel.