Quote by Charles Darwin
"Nature does not proceed by leaps, and therefore, if species have really proceeded from other species by insensibly fine gradations, we ought not to find in that geological formation and in that stratum distinct species."
More from Charles Darwin
"There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved."
"It is not the strongest of the species that survives, nor the most intelligent, but the one most responsive to change."
"The struggle for existence will always be there."
"Nothing in biology makes sense except in the light of evolution."