Charles Ellicott Commentary Ecclesiastes 9:1

"For all this I laid to my heart, even to explore all this: that the righteous, and the wise, and their works, are in the hand of God; whether it be love or hatred, man knoweth it not; all is before them." — Ecclesiastes 9:1 (ASV)

No man knoweth.— If this verse stood by itself, we would understand, “Man cannot know whether he will experience marks of divine favor, or the reverse;” but taking Ecclesiastes 9:6 into account, we understand it to refer to a man’s own love or hatred, the objects of which he cannot tell beforehand.

By all.— Rather, all is before them.