Plutarch, Comparison of Agis and Cleomenes and the Gracchi
Bernadotte Perrin, Ed.

3. I think, too, that the way in which the men died makes manifest a difference in their high excellence. For the Gracchi fought against their fellow citizens, and then died as they sought to make their escape; but in the case of the Greeks, Agis would not kill a single citizen, and therefore died what one might almost call a voluntary death, and Cleomenes, after setting out to avenge himself for insults and wrongs, found the occasion unfavourable and with a good courage slew himself. [2] But again, when we take the opposite view of their relative merits, Agis displayed no deed worthy of a great commander, but was cut off untimely, and with the many honourable victories won by Cleomenes we can compare the capture of the wall at Carthage by Tiberius, which was no trifling deed, and his truce at Numantia, by which twenty thousand Roman soldiers who had no other hope of salvation were spared; and Caius, too, manifested great bravery in military service at home, and great bravery in Sardinia, so that the brothers might have vied successfully with the foremost Roman generals, had they not been cut off untimely.