There's no committee that says, 'This is the type of person who can change the world - and you can't.' Realizing that anyone can do it is the first step. The next step is figuring out how you're going to do it.
The talent of success is nothing more than doing what you can do well, and doing well whatever you do without thought of fame. If it comes at all it will come because it is deserved, not because it is sought after.
The key to realizing a dream is to focus not on success but significance - and then even the small steps and little victories along your path will take on greater meaning.
Ambitious men spend their youth in rendering themselves worthy of patronage; it is their great mistake. While the foolish creatures are laying in stores of knowledge and energy, so that they shall not sink under the weight of responsible posts that recede from them, schemers come and go who are wealthy in words and destitute of ideas, astonish the ignorant, and creep into the confidence of those who have a little knowledge.