Benjamin Franklin, the United States statesman was wrong. There are three things certain in life, not two. He said, only death and taxes but I think he forgot to mention heartbreaks. Everyone is guaranteed that one heartbreak that reminds them, how evil humans can be.
The human capacity to disappoint is one of the most understated and miscalculated human phenomena besides the advertised merits of democracy. You must experience them in person for you to understand what they are.