Adam Clarke's Bible Commentary Verse 3. My heart was hot within me ] A natural feeling of repressed grief.
While I was musing ] What was at first a simple sensation of heat produced a flame; the fire broke out that had long been smothered. It is a metaphor taken from vegetables, which, being heaped together, begin to heat and ferment, if not scattered and exposed to the air; and will soon produce a flame, and consume themselves and every thing within their reach.
Matthew Henry Commentary
Verses 1-6 - If an evil thought should arise in the mind, suppress it. Watchfulnes in the habit, is the bridle upon the head; watchfulness in acts, is the hand upon the bridle. When not able to separate from wicked men, we should remember they will watch our words, and turn them, if they can to our disadvantage. Sometimes it may be necessary to keep silence even from good words; but in general we are wrong when backward to engage in edifying discourse. Impatience is a sin that has its caus within ourselves, and that is, musing; and its ill effects upo ourselves, and that is no less than burning. In our greatest health an prosperity, every man is altogether vanity, he cannot live long; he ma die soon. This is an undoubted truth, but we are very unwilling to believe it. Therefore let us pray that God would enlighten our minds by his Holy Spirit, and fill our hearts with his grace, that we may be ready for death every day and hour.
Original Hebrew חם2552 לבי3820 בקרבי7130 בהגיגי1901 תבער1197 אשׁ784 דברתי1696 בלשׁוני׃3956
