No man ever steps in the same river twice, for it's not the same river and he's not the same man.
Hide our ignorance as we will, an evening of wine soon reveals it.
The only constant is change. Unless you get a small group of neighbors together to stop it.
Dogs bark at a person whom they do not know.
If you do not expect the unexpected, you will not recognize it when it arrives.
The way up and the way down are one and the same.