Using Unix is the computing equivalent of listening only to music by David Cassidy.
Why would you have a language that is not theoretically exciting? Because it's very useful.
A smart terminal is not a smartass terminal, but rather a terminal you can educate.
Rule 1. You can't tell where a program is going to spend its time. Bottlenecks occur in surprising places, so don't try to second guess and put in a speed hack until you've proven that's where the bottleneck is
Narrowness of experience leads to narrowness of imagination
There's nothing in computing that can't be broken by another level of indirection.