This quote by George Henry Lewes recommends that science and poetry are two distinct disciplines that need to not be puzzled. Lewes is suggesting that science is a discipline that requires a various approach than poetry. Science is based on truths and proof, while poetry is based on emotion and creativity. Science is a sensible and systematic approach to understanding the world, while poetry is a creative and meaningful type of communication. Lewes is recommending that science should not be used to explain or analyze poetry, as the 2 are basically different. He is also recommending that poets must not try to use clinical methods to discuss their work, as this would be an improper use of science. By making this difference, Lewes is emphasizing the value of appreciating the limits in between science and poetry.
"To try to write a grand cosmical drama leads necessarily to myth. To try to let knowledge substitute ignorance in increasingly larger regions of space and time is science"
