Salmi 78:57

But turned back, and dealt unfaithfully like their fathers: they were turned aside like a deceitful bow.

Ver. 57. But turned back, &c.] They had a kind of willingness and velleity, a kind of wambling, as one speaketh, but it boiled not up to the full height of resolution for God.

They were turned aside like a deceitful bow] Non semper feriet quodcunque minabitur arcus; but a deceitful bow, that turneth back into belly, as we say, will be sure to deceive the archer, though he level his eye and his arrow never so directly to the mark, and think with himself to hit it. Lo, such a false rotten bow is man's deceitful heart; and hence the arrows of his purposes and promises vanish oft in the air, as smoke.