Devarim 19:15

Verse 15. If One opinion or view of a matter (though it seem derived from good) shall not be permitted to rise up against any principle in the soul to condemn it as being against the good derived from faith, or to condemn any act or desire of the will as being against the genuine life of charity; but when good and truth both testify against it, or where several truths combine to condemn it, the matter enforced by them shall be considered fully confirmed (Arcana Coelestia 4197).