[21:1] 1 sn “Heart” is a metonymy of subject; it signifies the ability to make decisions, if not the decisions themselves.
[21:1] 2 sn “Hand” in this passage is a personification; the word is frequently used idiomatically for “power,” and that is the sense intended here.
[21:1] 3 tn “Channels of water” (פַּלְגֵי, palge) is an adverbial accusative, functioning as a figure of comparison – “like channels of water.” Cf. NAB “Like a stream”; NIV “watercourse”; NRSV, NLT “a stream of water.”