Moderation is the silken string running through the pearl chain of all virtues.

Bishop Hall (1574-1656): Christian Moderation. Introduction.

  Observe moderation. In all, the fitting season is best.

Hesiod (Circa 720 (?) b c): Works and Days. Line 694.

  Moderation, the noblest gift of Heaven.

Euripides (484-406 b c): Medea. 636.