If you are distressed by anything external, the pain is not due to the thing itself, but to your estimate of it; and this you have the power to revoke at any moment.

  • -- Marcus Aurelius 马库斯·奥雷利乌斯

如果你为任何外在的东西而苦恼,这种痛苦不是由于事物本身,而是由于你对它的估计;你随时都可以撤销它。