If you can walk with the crowd and keep your virtue,
Or walk with Kings-nor lose the common touch;
If neither foes nor loving friends can hurt you;
If all men count with you, but none too much;
If you can fill the unforgiving minute
With sixty seconds' worth of distance run,
Yours is the Earth and everything that's in it,
And - which is more - you'll be a man my son!
It is indolence... Indolence and love of ease; a want of all laudable ambition, of taste for good company, or of inclination to take the trouble of being agreeable, which make men clergymen. A clergyman has nothing to do but be slovenly and selfish; read the newspaper, watch the weather, and quarrel with his wife. His curate does all the work and the business of his own life is to dine.
Keep away from people who try to belittle your ambitions. Small people always do that, but the really great make you feel that you, too, can become great.