Contemplation on Lasting and Permanence

What is permanence ? What is lasting ? I think there are many of you who have contemplated on this issue. There are different depths of contemplation on lasting. Some contemplation is very shallow ... as I call...skin deep. Some are very deep contemplation. Some of you hear others or read about articles on lasting and permanence from someone else. Maybe an author, a friend, lecturers, philosophers, religious leaders ...etc. There are some who think deeper into the topic and there are some who just listen and think for a while to check if it is true and then accept it or there are those who merely accept it just because someone said it.

The passing clouds .... seperating and gathering...

Spring to Summer, Autumn to Winter ...

Life and Death , Death and Life ...

Maybe, our true nature is the one that last ?