“It is difficult to say what is impossible, for the dream of yesterday is the hope of today and the reality of tomorrow.”

Robert H. Goddard

An optimist is a person who sees only the lights in the picture,

whereas a pessimist sees only the shadows.

An idealist, however, is one who sees the light and the shadows,

but in addition sees something else:

the possibility of changing the picture,

of making the lights prevail over the shadows.

Felix Adler