Nothing in the world will forever belong to you, including your most beloved ones, your grownup children, your wealth, etc. Even your body will turn into ash and return to the ground. We can only use everything in this world, but can never fully possess them. Everything in this world is on loan for us to use. As a result, we should not be clinging onto worldly matter which arises and ends from the interaction of conditions. Life can be liken to a visitor who should come and leave happily. The most important thing is to treasure the present.