▼tn Anatomically the Hebrew word לֵב (lev) refers to the “heart.” But abstractly it can refer to one’s inner self, will, understanding, or mind. They did not see the heart and mind in opposition, such that the advice here includes both one’s thinking and feelings.

▼tn Heb “more than any guard.” The preposition מִן (min) has its comparative sense “more than.” The noun מִשְׁמָר (mishmar) refers here to the act of guarding, protection, or vigilance (BDB 1038 s.v. מִשְׁמָר; HALOT 649 s.v. מִשְׁמָר).

▼sn The word תּוֹצְאוֹת (totseʾot, from יָצָא, yatsaʾ) means “outgoings; extremities; sources.” It is used here for starting points, like a fountainhead, and so the translation “sources” works well.