Never let the future disturb you. You will meet it, if you have to, with the same weapons of reason which today arm you against the present.
Look back over the past, with its changing empires that rose and fell, and you can foresee the future, too.
Deem not life a thing of consequence. For look at the yawning void of the future, and at that other limitless space, the past.
Take it that you have died today, and your life's story is ended; and henceforward regard what future time may be given you as uncovenanted surplus, and live it out in harmony with nature.
And can anything else that is useful be accomplished without change? Do you not see then that for yourself also to change is just the same, and equally necessary for the universal nature?