A pessimist is one who makes difficulties of his opportunities and an optimist is one who makes opportunities of his difficulties.

A pessimist is one who makes difficulties of his opportunities and an optimist is one who makes opportunities of his difficulties.

悲观主义者是在机遇中创造困难的人，乐观主义者是在困难中创造机遇的人。

-- Harry S. Truman 哈里·S·杜鲁门