text: Refresh yourself with such thoughts as these, and meanwhile reserve some hours for our letters. There will come a time when we shall be united again and brought together; however short this time may be, we shall make it long by knowing how to employ it. For, as Posidonius says: "A single day among the learned lasts longer than the longest life of the ignorant." Meanwhile, hold fast to this thought, and grip it close: yield not to adversity; trust not to prosperity; keep before your eyes the full scope of Fortune's power, as if she would surely do whatever is in her power to do. That which has been long expected comes more gently. Farewell.