Always remember those things that tend to strengthen and improve your understanding. You cannot learn without attention, neither retain those lessons that you have once learnt without frequently reflecting upon and reviewing them in your mind; by this means, things long past will remain impressed upon your memory.

It is of no use to commit whole pages to memory, merely to recite them once without hesitation; you must think of the meaning more than the words - of the ideas more than the language.

Time passed solely in the pursuit of pleasure leaves no solid enjoyment for the future; but from the hours you spend in reading and studying useful books, you will gather a golden harvest in future years.

As you have learnt something of time, value and make a proper use of it. Once past, it knows no return; how necessary, then, that you spend it in improving your mind and fitting it for future happiness and usefulness.

When I finished high school, I was 16, and in Argentina you have to choose a career right after high school. There is no such thing as a liberal arts education.

I knew I wanted to be a part of NASA in any case, and so I chose my goals in education to be consistent with working at NASA even as, you know, a scientist.

The study and knowledge of the universe would somehow be lame and defective were no practical results to follow.

I have two tutors - a maths tutor and another tutor who does all the other subjects. It is part of the deal with myself; I really want to finish school. I like learning and education, and I think it is really important.