Lest there be in any of you. — Better, lest haply there shall be in any one of you. (See above, on Hebrews 3:7.)
In departing. — Better, in falling away from a Living God. The heart of unbelief will manifest its evil in apostasy. The Greek word apistia stands in direct contrast to “faithful” (pistos), Hebrews 3:2, and combines the ideas of “unbelief” and “faithlessness.” He whose words they have heard is a living God, ever watchful in warning and entreaty (Hebrews 3:8), but also in the sure punishment of the faithless (Hebrews 3:11; Hebrews 10:31).