“The fact that we cannot now produce a detailed understanding of, say, altered states of consciousness in terms of brain chemistry no more implies the existence of a ‘spirit world’ than a sunflower following the sun in its course across the sky was evidence of a literal miracle before we knew about phototropism and plant hormones.”

“The fact that we cannot now produce a detailed understanding of, say, altered states of consciousness in terms of brain chemistry no more implies the existence of a ‘spirit world’ than a sunflower following the sun in its course across the sky was evidence of a literal miracle before we knew about phototropism and plant hormones.”

— Carl Sagan