Knowledge is valuable only when it is shared.
Maybe God wants us to meet a few wrong people before meeting the right one， so that when we finally meet the person， we will know how to be grateful。
A mathematician is a device for turning coffee into theorems.
Every experiment, even if it fails, teaches us something valuable.
The future is already here — it's just not very evenly distributed.
The metropolis exacts from man as a discriminating creature a different amount of consciousness than does rural life.