John Wesley on 1 Samuel 14:10

A sign - Jonathan not being assured of the success of this exploit, desires a sign; and by the instinct of God's Spirit, pitches upon this. Divers such motions and extraordinary impulses there were among great and good men in ancient times. Observe; God has the governing of the hearts and tongues of all men, even of those that know him not, and serves his own purposes by them, tho' they mean not so, neither does their hearts think so.