Leverage work that has already been done

Anders Hejlsberg: Leverage is everything today. Your computer is, from a programming perspective, basically a bottomless pit. You could write code from now until the day you die and you would never fill it up. There's so much capacity, and end user expectations keep going up and up and up. The only way you really succeed is by finding smart ways to leverage work that has already been done. That wasn't the case if you go back 25, 30 years ago. You had 64k of memory, well, gee, that would fill up in a month or two.
[Masterminds of Programming]