One becomes an active participant in the world when he or she believes in something. Faith, optimism, and hope—we have to have those things as human beings; otherwise, life is unbearable because there is nothing that we can see beyond ourselves.
The word "humility" (also "human") is derived from the Latin "humus," meaning "the soil." Perhaps this is not simply because it entails stooping and returning to earthly origins, but also because, as we are rooted in this earth of everyday life, we find in it all the vitality and fertility unnoticed by people who mostly tramp on across the surface, drawn by distant landscapes.