Son of man, these men have taken their idols into their hearts. Ezekiel 14:3
"Let us beware lest we in our pride accept the erroneous notion that idolatry consists only in kneeling down before visible objects of adoration, and that civilized peoples are therefore free from it. The essence of idolatry is the entertainment of thoughts about God that are unworthy of him."
A. W. Tozer, The Knowledge of the Holy, page 11.