Letters 44.5

Then who is well-born? He who is by nature well fitted for virtue. That is the one point to be considered; otherwise, if you hark back to antiquity, every one traces back to a date before which there is nothing. From the earliest beginnings of the universe to the present time, we have been led forward out of origins that were alternately illustrious and ignoble. A hall full of smoke-begrimed busts does not make the nobleman. No past life has been lived to lend us glory, and that which has existed before us is not ours; the soul alone renders us noble, and it may rise superior to Fortune out of any earlier condition, no matter what that condition has been.

Seneca, Letters to Lucilius 44.5, translated by Richard Mott Gummere