Matthew Henry Commentary Proverbs 21:1

"The king`s heart is in the hand of Jehovah as the watercourses: He turneth it whithersoever he will." — Proverbs 21:1 (ASV)

The believer, perceiving that the Lord rules every heart as He sees fit, like a farmer who turns the water through his fields as he pleases, seeks to have his own heart, and the hearts of others, directed in his faith, fear, and love.