I hated all my work that I labored at under the sun because I must leave it to the man who comes after me.

When there is a man whose work was done with wisdom, knowledge, and skill, and he must give his portion to a man who has not worked for it, this too is futile and a great wrong.

If the ax is dull, and one does not sharpen its edge,
then one must exert more strength;
however, the advantage of wisdom is that it brings success.