记忆就像一只狗,它喜欢躺在哪里就躺在哪里。
宁静的心灵是健康的源泉。
You can't change what's already happened, so focus on the present moment.
My life has no direction, no aim, no meaning. And yet I'm happy.
Mathematics is not a spectator sport. You have to do it to understand it.