Suggested quotations from Sophocles (c. 496-406 BC) - my second favorite playwright. Bartlett's Familiar Quotations is a godsend online to help remind you of those phrases you've heard, but cannot trace; try it At Bartleby

If I am Sophocles, I am not mad; and if I am mad, I am not Sophocles.

Do nothing secretly; for Time sees and hears all things, and discloses all.

Death is not the worst evil, but rather when we wish to die and cannot. [Electra]

A lie never lives to be old.

Nobody loves life like an old man.

All quotations are properly attributed in Bartlett, per the link below.

I couldn't find a web source on Sophocles' life nearly as wonderful as he deserves, but the link shown at Britannia will at least provide basic information on his life and work!

Britannica: Sophocles
Bartlett's Dictionary: Bartleby: Sophocles (Attributions}