thy hand findeth to do. Hand put by Figure of speech Metonymy (of Cause), App-6, for the strength put forth by it (Leviticus 12:8; Leviticus 25:28).
do it with thy might. do it while thou art able, and have time to do it.
nor knowledge, &c. See note on Ecclesiastes 9:5, above.
wisdom. Hebrew. chakmah. See note on Ecclesiastes 1:2. t
he grave. Hebrew Sheol. App-35.