Remember, ambition is a complex thing, made up of many attributes of characted. Step by step you reach your ambition in life. The whole object of education is to inspire a higher vision of life. I cannot imagine a greater boon to a young man than to possess high ideals and purposes in life. Sometimes this high ideal is nothing more than strict performance of duty.
Opportunity always comes to the one who performs the daily duties well.
You will be called up higher if you perform the task set before you conscientiously, however may be the start. Only human beings with souls have ambition and inspirations. Animals have no vision beyond existence. Man only has ideals. Everything that exists in this world first pre-existed in the form of a vision, so first get a vision, an ideal, a purpose.