Nothing lasts

Everything dies eventually.

People die.

So do their morals, opinions, values. Their thoughts, dreams, and ideas. 

Entire races die. Their cultures die. Their beliefs.

Even Gods die, when people stop believing.

Everything changes and everything dies. For better or worse, it all goes. As much as people seem like they never change.

Societies and ideals die. 

All things, living and not, die.

Plants die. Animals die.

Our Earth dies.

In a sense, even rocks die. They'll erode away into nothing. None of what currently does will exist some day.

It'll all go. It'll all die.

Nothing lasts forever.