Focus is a word that is often used to refer to concentration. If your main focus is on graduating college as a doctor then this is what you will concentrate on while you are in school, spending your time studying and learning rather than drinking and partying. Focus can also mean something that is the exact center of your attention, such as being the focus of a criminal investigation.
If we were meant to stay in one place, we'd have roots instead of feet.
The secret of change is to focus all your energy not on fighting the old, but on building the new.
If you can imagine it, you can achieve it. If you can dream it, you can become it.