When Marconi suggested the possibility of wireless transmission of sound (the radio),he was committed to a mental institution. But people like Lincoln, Edison, and Marconi were strongly motivated. So they didn't give up. They somehow knew that the only real failure is the one from which we learn nothing. They seemed to go on the assumption that there is no failure greater than the failure of not trying, and so they continued to try in the face of repeated failures.
The fully human person is in deep and meaningful contact with the world outside of him. He not only listens to himself, but to the voices of the world. The breadth of his own individual experience is infinitely multiplied through a sensitive empathy with others. He suffers with the suffering, rejoices with the joyful. He is born again in every springtime, feels the impact of the great mysteries of life: birth, growth, love, suffering, death. His heart skips along with the 'young lovers', and he knows something of the exhilaration that is in them. He also knows the ghetto's philosophy of despair, the loneliness of suffering without relief, and the bell never tolls without tolling in some strange way for him.