10 Among physicians he gained the foremost place with no great trouble, by merely exhibiting his capacity, or rather some slight specimen of his capacity, and was immediately numbered among the friends of the Emperor, and enjoyed the highest honours. But he placed the humane functions of his art at the disposal of the authorities free of cost, knowing that nothing leads to further advancement than virtue and renown for honourable deeds; so that he far surpassed in fame those to whom he was inferior in rank.
By his modesty he so won the love of all that they entrusted their precious charges to his care, without requiring him to be sworn by Hippocrates, since the simplicity of Crates was nothing to his own: winning in general a respect beyond his rank; for besides the present repute he was ever thought to have justly won, a still greater one was anticipated for him, both by the Emperors themselves and by all who occupied the nearest positions to them. But, most important, neither by his fame, nor by the luxury which surrounded him, was his nobility of soul corrupted; for amidst his many claims to honour, he himself cared most for being, and being known to be, a Christian, and, compared with this, all other things were to him but trifling toys.
For they belong to the part we play before others on a stage which is very quickly set up and taken down again— perhaps indeed more quickly destroyed than put together, as we may see from the manifold changes of life, and fluctuations of prosperity; while the only real and securely abiding good thing is godliness.
Source: Orations (New Advent)