Knowledge, Action, Devotion are complementary to each other.

Knowing others is wisdom, knowing yourself is Enlightenment.

A thought is an idea in transit.

Physics is like sex: sure, it may give some practical results, but that's not why we do it.

That men do not learn very much from the lessons of history is the most important of all the lessons that history has to teach.

Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.

When I am attacked by gloomy thoughts, nothing helps me so much as running to my books. They quickly absorb me and banish the clouds from my mind.

If you're not learning while you're earning, you're cheating yourself out of the better portion of your compensation.

Education is a system of imposed ignorance.

It is possible to fly without motors, but not without knowledge and skill.

Know what you are talking about.

Any sufficiently advanced technology is indistinguishable from magic.

Science is not only a disciple of reason but, also, one of romance and passion.

It is beyond a doubt that all our knowledge begins with experience.

As we acquire more knowledge, things do not become more comprehensible but more mysterious.

I think that kids have a greater capacity for processing things than we give them credit for.

Civilization is a race between disaster and education.

Necessity is the mother of invention.

If you want the present to be different from the past, study the past.

What we know is a drop, what we don't know is an ocean.

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.