Marcus Aurelius
Meditations 8.15
Remember that as it is a shame to be surprised if the fig-tree produces figs, so it is to be surprised if the world produces such and such things of which it is productive; and for the physician and the helmsman it is a shame to be surprised if a man has a fever, or if the wind is unfavorable.
Marcus Aurelius, Meditations 8.15, translated by George Long
Remember that, as it is monstrous to be surprised at a fig-tree bearing figs, so also is it to be surprised at the Universe bearing its own particular crop. Likewise it is monstrous for a physician or a steersman to be surprised that a patient has fever or that a contrary wind has sprung up.
Marcus Aurelius, Meditations 8.15, translated by C. R. Haines