Elie Wiesel:

I have learned two lessons in my life: first, there are no sufficient literary, psychological, or historical answers to human tragedy, only moral ones. Second, just as despair can come to one another only from other human beings, hope, too, can be given to one only by other human beings.

Emily Dickenson:

~ Hope is the thing with feathers that perches in the soul and sings the tune without the words and never stops at all. ~

Vaclav Havel: ~ Hope is not the conviction that something will turn out well, but the certainty that something makes sense regardless of how it turns out. ~

I skipped religious leaders and US politicians for obvious reasons.