Even scientific knowledge, if there is anything to it, is not a random observation of random objects for the critical objectivity of significant knowledge is attained as a practice only philosophically in inner action.

There was never a nation great until it came to the knowledge that it had nowhere in the world to go for help.

Later, I realized that the mission had to end in a let-down because the real barrier wasn't in the sky but in our knowledge and experience of supersonic flight.

I don't know what is better than the work that is given to the actor-to teach the human heart the knowledge of itself.

And let me tell you, you boys of America, that there is no higher inspiration to any man to be a good man, a good citizen, and a good son, brother, or father, than the knowledge that you come from honest blood.