Everything comes if a man will only wait.
Benjamin Disraeli (1804-1881) British politician and author.
That which the fountain sends forth returns again to the fountain.
Henry Wadsworth Longfellow (1807-1882) U.S. poet.
In all things there is a law of cycles.
Publius Cornelius Tacitus (55-117) Roman historian.
By law of periodical repetition, everything which has happened once must happen again and again -- and not capriciously, but at regular periods, and each thing in its own period, not another's and each obeying its own law.
Mark Twain (1835-1910) U.S. humorist, writer, and lecturer.