Developed countries will always welcome the Einsteins of this world - those individuals whose talents are already recognized and deemed to have value. This welcome doesn't usually extend to the poor and uneducated people seeking to enter the country. But the truth, supported by the facts of history and the richness of immigrant contribution to America's distinction in the world, is that the most entrepreneurial, innovative, motivated citizen is the one who has been given an opportunity and wants to repay the debt.

Doesn't matter how menial may be the job that you're doing today. If you have dreams, that will turn into something positive in the future.

You know how in sports baseball players, they hit home runs. Football players, they throw and they score touchdowns. I get to do something that very few people get to do - I get to touch the human brain, and every day I get to hit home runs, I get to score touchdowns.

The same skills that I used as a welder, as a migrant farm worker, are similar skills that I'm using as a brain surgeon.

To hear the amount of hate that people have in the United States is disheartening. However, I still have hope that we have not reached the pinnacle.

As a researcher at US Berkeley I used to go into the brains of small, little animals and study the way that brains were connected and how little did I know that one day that was going to be my future - exploring the universe of the brain and hold it in between my hands and look at cells migrating.

You have to have passion for everything you do, and you've got to look at the positive side.