The mind clings to whatever it has created: things, objects, ideas, relationships, positions. That is why it is not ready to give them up when the time comes. Such a mind says, ‘It is going to remain with me. It is mine now.’
But the nature of nature replies, ‘Nothing is thine and nothing is mine.’
We have to re-educate our mind. Otherwise it tends toward attachment and aversion, thereby creating sadness.
Find out what is permanent and what is impermanent. Separate the grain from the chaff. Now they are currently mixed together. Learn how to fan out the husk from the genuine kernel. Then you are able to know what is everlasting and what is temporary.
For that you have to come to the center of yourself.