'Unfortunate' in the Bible

This is the unfortunate fact about everything that happens on earth: the same fate awaits everyone. In addition to this, the hearts of all people are full of evil, and there is folly in their hearts during their lives -- then they die.

Surely, no one knows his appointed time! Like fish that are caught in a deadly net, and like birds that are caught in a snare -- just like them, all people are ensnared at an unfortunate time that falls upon them suddenly.