I have no right, by anything I do or say, to demean a human being in his own eyes. What matters is not what I think of him; it is what he thinks of himself. To undermine a man's self-respect is a sin.
I know but one freedom, and that is the freedom of the mind.
And now here is my secret, a very simple secret; it is only with the heart that one can see rightly, what is essential is invisible to the eye.
War is not an adventure. It is a disease. It is like typhus.
The aeroplane has unveiled for us the true face of the earth.
Whoever loves above all the approach of love will never know the joy of attaining it.
We say nothing essential about the cathedral when we speak of its stones. We say nothing essential about Man when we seek to define him by the qualities of men.
True happiness comes from the joy of deeds well done, the zest of creating things new.
The notion of looking on at life has always been hateful to me. What am I if I am not a participant? In order to be, I must participate.
To be a man is, precisely, to be responsible.
The machine does not isolate man from the great problems of nature but plunges him more deeply into them.
The time for action is now. It's never too late to do something.
The one thing that matters is the effort.
Transport of the mails, transport of the human voice, transport of flickering pictures-in this century as in others our highest accomplishments still have the single aim of bringing men together.
The meaning of things lies not in the things themselves, but in our attitude towards them.