1-6. Balaam, Double-Minded—At the time Balak sent messengers for him [Balaam], he was double-minded, pursuing a course to gain and retain the favor and honor of the enemies of the Lord, for the sake of rewards he received from them. At the same time he was professing to be a prophet of God. Idolatrous nations believed that curses might be uttered which would affect individuals, and even whole nations (Spiritual Gifts 4a:43).
(1BC 1116.5)
15-17. Balaam‘s One Sin, Covetousness—Here is a solemn warning for the people of God today, to allow no unchristian trait to live in their hearts. A sin which is fostered becomes habitual; and, strengthened by repetition, it soon exerts a controlling influence, bringing into subjection all the nobler powers. Balaam loved the reward of unrighteousness. The sin of covetousness, which God ranks with idolatry, he did not resist and overcome. Satan obtained entire control of him through this one fault, which deteriorated his character, and made him a time-server. He called God his master; but he did not serve Him; he did not work the works of God (The Signs of the Times, November 18, 1880).
(1BC 1116.6)