"When I consider the narrow limits within which our active and inquiring faculties are confined; when I see how all our energies are wasted in providing for mere necessities . . . and then that all our satisfaction concerning certain subjects of investigation ends in nothing better than a passive resignation . . . when I consider al this . . . I am silent. I examine my own being, and find there a world, but a world rather of imagination and dim desires, than of distinctness and living power."