For there is man his labor in wisdom, and in knowledge and in success; and to man not laboring in it he shall give his portion. Also this is vanity and much evil.

And I saw all labour, and all success of work, that it is man's jealousy of his neighbour. This also is vanity and pursuit of the wind.

In the multitude of good they were multiplied eating it: and what the success to its possessors but seeing with his eyes?

Again, I observed this on the earth: the race is not always won by the swiftest, the battle is not always won by the strongest; prosperity does not always belong to those who are the wisest, wealth does not always belong to those who are the most discerning, nor does success always come to those with the most knowledge -- for time and chance may overcome them all.

If the axe is dull and he does not sharpen its edge, then he must exert more strength. Wisdom has the advantage of giving success.