Truth in philosophy means that concept and external reality correspond.

Genuine tragedies in the world are not conflicts between right and wrong. They are conflicts between two rights.

When liberty is mentioned, we must always be careful to observe whether it is not really the assertion of private interests which is thereby designated.

We do not need to be shoemakers to know if our shoes fit, and just as little have we any need to be professionals to acquire knowledge of matters of universal interest.

There is no one area of chemical engineering that specifically helped me in my career as an astronaut, it was more the general education in engineering. Also, it was a very difficult and rigorous course. So, it made me strong and resourceful.

It was the most exciting thing to leave secondary school and go to college, to have that freedom to study whatever I wanted.

I came to the Philippines to follow my father who came here earlier, looking for a better life. I helped my father in our sari-sari store. I also asked him if I could go back to school so I could learn English and improve myself.

A love of books, of holding a book, turning its pages, looking at its pictures, and living its fascinating stories goes hand-in-hand with a love of learning.