It is right that we be concerned with the scientific probity of metaphysics.

You know you have loved someone when you have glimpsed in them that which is too beautiful to die.

I almost think that hope is for the soul what breathing is for the living organism. Where hope is lacking the soul dries up and withers.

Music at times is more like perfume than mathematics.

A mystery is a problem that encroaches upon itself because the questioner becomes the object of the question. Getting to Mars is a problem. Falling in love is a mystery.

Hope consists in asserting that there is at the heart of being, beyond all data, beyond all inventories and all calculations, a mysterious principle which is in connivance with me

The dynamic element in my philosophy, taken as a whole, can be seen as an obstinate and untiring battle against the spirit of abstraction.

... freedom is a conquest, always partial, always precarious, always challenged. ... the freest person is the one with the most hope.

Contemporary thinkers would say that man is continuously transcending himself.

On a grassroots level we say that man can touch more than he can grasp.

I not only have a body; I am this body.

Knowledge is the most prized commodity in the entire universe, and it is infinite in its commodity.

Nothing good was learnt too swiftly. Knowledge should be a purposeful accumulance of observed experience, applied and tested to the full.

Focus on your purpose, and your stress will melt away.

I believe that this Nation should commit itself to achieving the goal, before this decade is out, of landing a man on the moon and returning him safely to earth.

Today, the concept of business is to make money. Making money is the name of the business.

When you hire me, you hire a nut who is going to work 24 hours a day for you and never, ever burn his audience.

I am a professional. At the circuit I am calm. At home I am very different.

The computer is here to stay, therefore it must be kept in its proper place as a tool and a slave, or we will become sorcerer's apprentices, with data data everywhere and not a thought to think.

In this world, all power rests upon force.

What the psychedelics are for us as a species, rather than for each one of us as an individual, what they are for us as a species is an enzyme that catalyzes the language-making capacity.