That which enters the mind through reason can be corrected. That which is admitted through faith, hardly ever.

The brain is a world consisting of a number of unexplored continents and great stretches of unknown territory.

Every man if he so desires becomes sculptor of his own brain.

The worst part is not in making a mistake but in trying to justify it, instead of using it as a heaven-sent warning of our mindlessness or our ignorance.

In summary, all great work is the fruit of patience and perseverance, combined with tenacious concentration on a subject over a period of months or years.

Unfortunately, nature seems unaware of our intellectual need for convenience and unity, and very often takes delight in complication and diversity.

There are no small problems. Problems that appear small are large problems that are not understood

It is idle to dispute with old men. Their opinions, like their cranial sutures, are ossified.

In adult centers the nerve paths are something fixed, ended, immutable. Everything may die, nothing may be regenerated.

To know the brain...is equivalent to ascertaining the material course of thought and will, to discovering the intimate history of life in its perpetual duel with external forces.

Nothing inspires more reverence and awe in me than an old man who knows how to change his mind.

You are prettier than you can imagine.

Why did you give up hope?

It's gonna take me a lot longer than a year without you to get over you.

No great thing comes without a curse.

Unmet desires are the source of most of the conflict and many of the struggles in our lives. When we don’t get what we want, or when and how we want it, life can get pretty ugly.

I would rather be governed by the first three hundred names in the Boston telephone book than by the Faculty of Harvard University.

In the days before the vote, I bet that the British would stay in the EU.

A lot of people probably say I'm stupid, and they're probably right, because there are people who take days off who are still in the league, and I'm not.

I'm not a genetically superior person. I built my body.

Normally I wouldn't spoil anything because I love surprises - I don't even shake my presents at Christmas.