“The king’s heart is in the hand of the Lord, as the rivers of water: He turneth it whithersoever He will” (Pro 21:1). What could be more explicit? Out of the heart are the issues of life (Prov 4:23), for as a man “thinketh in his heart, so is he (Prov 23:7). If then the heart is in the hand of the Lord, and if ‘He turneth it whithersoever He will,” is it not clear that men, yea, governors and rulers, and so all men, are completely beneath the governmental control of the Almighty!”
~ Arthur a Pink, “The Sovereignty of God”
See also:
Proverbs 16:1 “The preparations of the heart in man, and the answer of the tongue, [is] from the LORD.”
Proverbs 16:9 “A man’s heart deviseth his way: but the LORD directeth his steps.”
Proverbs 20:24 “Man’s goings [are] of the LORD; how can a man then understand his own way?”
Psalm 105:25 “He turned their heart to hate his people, to deal subtilly with his servants.”
Psalm 106:46 “He made them also to be pitied of all those that carried them captives.”
Spiritual Wrestlings 