For those who believe in, " You can do almost everything", I must say, it is a nice thought and great to practice, but within the stretchable limits. Do what you can and what you must, to an extent that your mind, body, and time will permit. [ It is surely important to validate if your limit is because you are lazy or have been too busy. If you are limiting yourself because you are lazy, you alone can help yourself.]
Never limit your mind on its dreams and aspirations, but when you put them into action, just remember the feasibility limits as on date. You cannot think of building a house on Moon, when you have not even managed to buy a square foot of land, in the most remote real estate zone in your village. It is important not to lose focus on your immediate needs and short term plans in life, while working too hard on a long term dream.
You might be a stunning success twenty years later, but it is equally important to ride with the wave ( loved this term, borrowed from a conversation recently) till you know you have covered the basic personal requirements for you and your close circle. Anything you do in the name of acheivement should not affect your close circle more than they can handle.This applies to all walks of life - Art, Academics, Politics, Scientific research, Astronomy, Geology, Law, Engineering are a few examples of fields where people get so deep into the achievement mode, that they forget their personal life where other people are involved.