Learn to ne happy with what you have.
As a mountain is unshaken by the wind, so the heart of a wise person is unmoved by all the changes on this earth.
Beings are owners of their action, heirs of their action.
If you don't disturb yourself, like a broken gong does not vibrate, then you have achieved nirvana. Irritability no longer exists for you.
You can only lose what you cling to.
Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment.