In mathematics, you don't understand things. You just get used to them.
I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.
When you're old and your eyes are dim, There ain't no old shep gonna happen again
We'll still go walking down country lanes, I'll sing the same old song
Hear me call your name