Phenomena arising from causes and conditions are impermanent and empty.  Insight into impermanence and emptiness enables one to leave suffering behind and gain genuine happiness. 

Impermanence is the reality of phenomena in the process of time, where good and bad alternate. It teaches us to be aware and alert with a sense of crisis and preparedness, while living our lives with content.

The mind of the average person is afflicted by greed, aversion, and ignorance and therefore is deluded and impermanent, while the Buddha mind, or the pure mind, is marked by selfless wisdom and compassion and therefore is an unchanging mind. By changing our afflicted mind into a mind of wisdom, we are actually turning impermanence into infinite hope and creating a brighter future.

Impermanence means that life is finite and the time that we can really use is very limited. While we have to spend most of our life make a living, working for our family, we should make good use of our life and enhance the value of our life by having good intentions, speaking good words, and doing good deeds. If we can't do good deeds, at least we should make sure that people interacting with us don't suffer because of us.