Marcus Aurelius
Meditations 8.49
Say nothing more to thyself than what the first appearances report. Suppose that it has been reported to thee that a certain person speaks ill of thee. This has been reported; but that thou hast been injured, that has not been reported. I see that my child is sick. I do see; but that he is in danger, I do not see. Thus then always abide by the first appearances, and add nothing thyself from within, and then nothing happens to thee. Or rather add something like a man who knows everything that happens in the world.
Marcus Aurelius, Meditations 8.49, translated by George Long
Say no more to thyself than what the initial impressions report. This has been told thee, that so and so speaks ill of thee. This has been told thee, but it has not been told thee that thou art harmed. I see that my child is ailing. I see it, but I do not see that he is in danger. Keep then ever to first impressions and supplement them not on thy part from within, and nothing happens to thee. And yet do supplement them with this, that thou art familiar with every possible contingency in the world.
Marcus Aurelius, Meditations 8.49, translated by C. R. Haines