Great things are not done by impulse, but by a series of small things brought togeather

This quote means that nothing great was done the first time. It would be rare for someone to think of a theory or an idea for the first time with no defects. Perfection comes from practise, and repitition. I play basketball. When i took my first jumpshot, it did not go in. I spent several hours and many weeks perfecting my jumpshot so that when gameitme came, I had my jumpshot. Greatness is not created, it is developed through a series of things that leads you to your end product. Remember, Rome wasnt built in a day, it took two.