I, too, can work, and because I love to labor with my head and my hands, I am an optimist in spite of all. I used to think I should be thwarted in my… - Helen Keller

The richness of the human experience would lose something of rewarding joy if there were no limitations to overcome.

We have found that our great philosophers and our great men of action are optimists. So, too, our most potent men of letters have been optimists in their books and in their lives. No pessimist ever won an audience commensurately wide with his genius, and many optimistic writers have been read and admired out of all measure to their talents, simply because they wrote of the sunlit side of life.

Veličanstvenost bogatstva ljudskoga iskustva izgubila bi svoju vrednost i užitak kada ne bi postojale neke prepreke koje moramo preskočiti. Trenutak osvajanja planine ne bi bio ni upola toliko prekrasan kada ne bi bilo onih mračnih dolina koje smo prebrodili.