Science does not know its debt to imagination. Author: Ralph Waldo Emerson Copy Quote More from Ralph Waldo Emerson “One of the illusions of life is that the present hour is not the critical, deci…” “It is not the length of life, but the depth.” “Everything teaches transition, transference, metamorphosis: therein is human po…” “Even in the mud and scum of things, something always, always sings.”