TITLE: Inspiring a new generation
QUESTION [15 upvotes]: Tomorrow is a very special day for both my students and I: we will be starting a calculus course. I'm looking for some nice quotes to read to them to convey just what a complete game changer calculus was. I've done a quick Google search, but nothing acceptable comes up. 
I don't want anything too old fashioned, or too stuffy. Can anyone recommend anything to help me inspire a new generation of blossoming mathematicians?
Edit: I'm specifically interested in quotes that mention calculus by name, and that mention its impact upon mathematics.

REPLY [3 votes]: An advice from Jean d'Alembert to those who questioned the calculus could be appropriate :-) :
$$``\text{Allez en avant, et la foi vous viendra.''}$$ 
$$\text{(Push on and faith will catch up with you)}$$
(from these quotations or the answer from Piero D'Ancona at MO in 'Describe a topic in one sentence')
Silvanus Thompson's 1914 book "Calculus Made Easy" (available here) starts with :
$$``\text{What one fool can do, another can.''}$$
 $$\text{(Ancient bimian Proberb)}$$
(this was often cited by Richard Feynman)  
Thompson added (page 13) :
"Considering how many fools can calculate, it is
 surprising that it should be thought either a diﬃcult
 or a tedious task for any other fool to learn how to
 master the same tricks."