Their success was as a result of a passion for something they loved. A modest approach to life will also help you to avoid comparing your achievements to those of other people. Some people hit the ball out of the park on the first try, and there are others who have to work their way up the ladder. Some will get married right out of college, others will have to wait a few years and kiss a few frogs before they find the right person.
In fact, both Mark Zuckerberg and Colonel Sanders experienced many setbacks on the way to success. You will too. Do not expect that your life will be different. No matter what you hope to achieve, you are going to have to work harder than you have ever worked before, and you may have to wait longer than you expected too. The beautiful quality of modesty extends far beyond becoming successful.