Contemplating impermanence

Yesterday, I began reading Mind at Ease by Traleg Kyabgon and it promises to be excellent. I've read other works by this same teacher to my very great benefit and I certainly recommend him very highly.

Here's just a little snippet that makes a lot of sense to me:

"It is only by contemplating impermanence that we become reflective enough to recognize which things are worth pursuing and which are not. We also learn to see exactly what our confusions arise from, because our experiences of dissatisfaction and frustration initially come from a failure to reflect upon anything."

Well, that sums things up in a direct fashion, don't you think?
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