Nothing defines human beings better than their willingness to do irrational things in the pursuit of phenomenally unlikely payoffs.
Only through curiosity can we discover opportunities, and only through gambling can we take advantage of them.
Never speculate ... if you have savings, invest them in solid securities, lands, or property. The man who gambles upon the exchanges is in the condition of the man who gambles at the gaming table. He rarely, if ever, makes a permanent success.