Data abstraction is the reduction of a particular body of data to a simplified representation of the whole.
We've got to live, no matter how many skies have fallen.
Three things you need: The ability to not give up something till it works， the ability to give up something that does not work， and the trust in other people to help you distinguish between the two.
The meaning of earthly existence lies not, as we have grown used to thinking, in prospering but in the development of the soul.
The details are not just details; they make the product.