Ecclesiastes 2:3, 17

I explored with my mind how to gratify myself with wine while [at the same time] having my mind remain steady and guide me wisely; and how to take control of foolishness, until I could see what was good for the sons of men to do under heaven all the days of their lives.

So I hated life, for the work which had been done under the sun caused me only great sorrow; because all is futility and chasing after the wind.