Your chances of success in any undertaking can always be measured by your belief in yourself. - Robert Collier

Start where you are. Distant fields always look greener, but opportunity lies right where you are. Take advantage of every opportunity of service.

You have to compete in the same way for your reader's attention. He is not looking for your letter. He has a thousand and one other things more important to him to occupy his mind. Why should he divert his attention from them to plow through pages of type about you or your projects?

You can do as much as you think you can,
But you'll never accomplish more;
If you're afraid of yourself, young man,
There's little for you in store.
For failure comes from the inside first,
It's there if we only knew it,
And you can win, though you face the worst,
If you feel that you're going to do it.