There is nothing permanent in the world except change.

No one can step twice into the same river, nor touch mortal substance twice in the same condition. By the speed of its change, it scatters and gathers again.

Opposition brings concord. Out of discord comes the fairest harmony.

All things flow, nothing abides.

There is nothing permanent except change. [Therefore enjoy what good you have while you have it and endure and outlast what bad you can't cure immediately]

If one does not expect the unexpected, one will not find it out, since it is not to be searched out, and difficut to compass.

Men who love wisdom should acquaint themselves with a great many particulars.