It is best to avoid the beginnings of evil.
In human intercourse the tragedy begins, not when there is misunderstanding about words, but when silence is not understood.
If you can speak what you will never hear, if you can write what you will never read, you have done rare things.
If you have built castles in the air, your work need not be lost; that is where they should be. Now put the foundations under them.
Most of the luxuries and many of the so-called comforts of life, are not only not indispensable, but positive hindrances to the elevation of mankind.