The following quote is from 'The Pocket Thich Nhat Hanh' (click)
published by 'Shambhala Pocket Classics'.
"The Buddha taught that everything is impermanent-----flowers, tables, mountains,
political regimes, bodies, feelings, perceptions,
mental formations, and consciousness.
We cannot find anything that is permanent.
Flowers decompose, but knowing this does not prevent us from loving flowers.
In fact, we are able to love them more because we know how to treasure them
while they are still alive.
If we learn to look at a flower in a way that impermanence is revealed to us,
when it dies, we will not suffer.
Our Tibetan prayer flags are already starting to unravel.They don't last forever either.
Impermanence is more than an idea.
It is a practice to help us touch reality."