Ellen White does not use the exact phrase "our opinions can be idols," but she does clearly teach that anything—including our ideas, doctrines, or theories—can become idols if they take the place of God in our hearts and minds. Here are some relevant statements from her writings:
- "It is as easy to make an idol of false doctrines and theories as to fashion an idol of wood or stone. By misrepresenting the attributes of God, Satan leads men to conceive of him in a false character. With many, a philosophical idol is enthroned in the place of Jehovah..." (The Great Controversy, p. 583.1)
- "Anything that men love and trust in instead of loving the Lord and trusting wholly in Him becomes an idol and is thus registered in the books of heaven." (Testimonies for the Church, vol. 5, p. 250.1)
- "By idolatry he [the apostle] meant not only the worship of idols, but self-serving, love of ease, the gratification of appetite and passion. A mere profession of faith in Christ, a boastful knowledge of the truth, does not make a man a Christian." (The Acts of the Apostles, p. 317.1)
While she does not specifically say "opinions," her statements about "false doctrines and theories," "anything that men love and trust in," and "philosophical idols" make it clear that our cherished ideas or opinions can indeed become idols if they take precedence over God and His truth.
If you need a direct quote about "opinions" specifically, let me know and I can search further.
References:
- White, E. G. (1911). The Great Controversy, p. 583.1.
- White, E. G. (1885). Testimonies for the Church, vol. 5, p. 250.1.
- White, E. G. (1911). The Acts of the Apostles, p. 317.1.