唯一真正的失败是不去尝试。
资本主义社会的自由始终与古希腊共和国大致相同:奴隶主的自由。
学习数学的唯一方法就是做数学。
The true value of a forest is measured not just in board feet, but in biodiversity and ecosystem health.
Life is too short to be anything but happy.