How does "Nothing Gold Can Stay" show courage?

"Nothing Gold Can Stay" shows courage by determining that there is no permanent thing in this world. Everything which we are introduced to are temporary and can change its form existence showing that they are not permanent things in this world. Whether it is sadness or happiness, there is nothing which has the quality of being permanent. Everything in this world is subjected to mortality and this truth must be acknowledged by everyone on this earth.

It shows courage because it means that nothing is permanent.

Explanation:

Now that i think of it, its quite depressing.