I dedicated myself to using wisdom for study and discovery of everything that is done under heaven. God uses terrible things so human beings will struggle with life.

Of laughing I said, It is foolish; and of joy--What use is it?

The wise use their eyes, but the fool walks in darkness. I also perceived that the same outcome affects them all.

Then I said to myself, “As it happens to the fool, so death will also happen to me. What use is it then for me to be extremely wise?” Then I said in my heart, “This too is vanity (meaningless).”

But those riches perish by evil use. And he brings forth a son, and nothing is in his hand.

Wise use of possessions is good; it brings benefit to the living.

Use well the time of prosperity and remember the time of misfortune: For God maketh one by the other, so that a man can find nothing else.

I used my wisdom to test all of this. I said, "I want to be wise," but it was beyond me.

And, thereupon, I considered the lawless when buried, when they had entered, their graves , that, from the place of the Holy One, they used to go and boast in the city that they had so done, - even this, was vanity.

Use thy self to live joyfully with thy wife whom thou lovest, all the days of thy life which is but vanity, that God hath given thee under the Sun; all the days of thy vanity. For that is thy portion in this life, of all thy labor and travail that thou takest under the Sun.

If the axe is blunt, and one doesn't sharpen the edge, then he must use more strength; but skill brings success.

If the serpent bites before being charmed, then there is no profit for the charmer.