An EXPERT PROGRAMMER explains OO

Because I know you were all having so much trouble with this difficult concept.

http://theunixgeek.blogspot.com/2007/11/understanding-object-oriented.html

>>18
- In Lambda Calculus you construct programs by asking functions to perform tasks for you, and you don't need to worry about how it happens.
- Functions are so modular that they can be substituted for one another at any time, letting you more easily write programs whose behavior is decided at run-time when your program has the information it needs to decide that behavior.

...and that is Sparta.