Inscription on a Roman mosaic from excavations in the Appian way, Rome.
The Greek motto Know Thyself (“γνῶθι σεαυτόν”, or nosce te ipsum in Latin) combined with the fallen skeleton image to convey the famous warning about the inevitability of death:
Respice post te. Hominem te esse memento. Memento mori.
(Look behind. Remember that you are mortal. Remember death.)