A quotation or quote is the repetition of one expression as part of another one, particularly when the quoted expression is well-known or explicitly attributed by citation to its original source, and it is indicated by (punctuated with) quotation marks.
Never does nature say one thing and wisdom another.
Nature Quotes, Quotes on Nature, Quotation of Earth Day
After a visit to the beach, it's hard to believe that we live in a material world.
~ Pam Shaw
Quotes on Nature, Quotation of Earth Day, Earth Day Facts
Till now man has been up against Nature; from now on he will be up against his own nature.
~ Dennis Gabor
Quotes on Nature, Quotation of Earth Day, Nature Quotes