I never consciously place symbolism in my writing. That would be a self-conscious exercise and self-consciousness is defeating to any creative act. Better to get the subconscious to do the work for you, and get out of the way. The best symbolism is always unsuspected and natural. During a lifetime, one saves up information which collects itself around centers in the mind; these automatically become symbols on a subliminal level and need only be summoned in the heat of writing.
Ray Bradbury"Oh, ancient god, whatever your name," whispered Ahmed. "Help this lost son of a good father, this evil boy who meant no harm but slept in school, ran errands slowly, did not pray from his heart, ignored his mother, and did not hold his family in great esteem. For all this I know I must suffer. But here in the midst of silence, at the desert's heart, where even the wind knows not my name? Must I die so young? Am I to be forgotten without having been?"
Ray BradburyWe Earth Men have a talent for ruining big, beautiful things. The only reason we didn't set up hot-dog stands in the midst of the Egyptian temple of Karnak is because it was out of the way and served no large commercial purpose.
Ray Bradbury