While living in this world and interacting with things and beings of this world, we should always have this predominant thought that nothing in this world is permanent. Things,  beings, relationships, experiences, events--everything is temporary, impermanent. While one may experience these as and when they come in one's life as per one's destiny, one should never forget this fact. This will prevent us from being attached to these. Attachment to ever-changing, ephemeral things and beings of this world is one of the biggest cause of all our pain. miseries and sorrows.

Having understood the impermanency of everything, one should seek that which is the only permanent entity in this ever-changing, ephemeral world. Having realised that which is permanent, and having firm abidance in that which is permanent, while interacting with things and beings of this world, is the secret of Infinite Bliss.

By Swami Avdhutananda-Sikkim-India