WHO AM I?

Face tears and smiles, wide thoughts all piled, a dim light down the mile, dwelling in the dark all the while. WHO AM I? breathes full of life, exists without sight, defines tales without mine, peaches light, but dark lurks within, a teacher with knowledge at "arm length" WHO AM I? the one happy, the one sad, wild in thought but timidity drowned, the darkest, ... the star, a child, ..yet an adult, who am I? drowned in the sea of solving the puzzle. WHO DID YOU THINK I AM?