It is by these means, my dear Scipio,--for you said that you and Laelius were wont to express surprise on this point,--that my old age sits lightly on me, and is not only not oppressive but even delightful. But if I am wrong in thinking the human soul immortal, I am glad to be wrong; nor will I allow the mistake which gives me so much pleasure to be wrested from me as long as I live. But if when dead, as some insignificant philosophers think, I am to be without sensation, I am not afraid of dead philosophers deriding my errors. Again, if we are not to be immortal, it is nevertheless what a man must wish--to have his life end at its proper time. For nature puts a limit to living as to everything else. Now, old age is as it were the playing out of the drama, the full fatigue of which we should shun, especially when we also feel that we have had more than enough of it. This is all I had to say on old age. I pray that you may arrive at it, that you may put my words to a practical test.