Everything is transient in this world

I was watching a Korean movie about the love affair of a young girl who suffered from leukemia and a young man. They loved each other so much that after the young girl had died of the incurable disease, the man still comes to the island on the anniversary of her death every year.

Everything in this world is transient. It is not constant as even in water the molecules in it keep moving and may acquire enough energy to escape from liquid state to gaseous state as steam. No one can really say that they can love each other forever.

Hence we should not attach too much to the love of someone so as to prevent grief. If we can understand that everything is transient, then we will not be so sad when we have to say good-bye to our loved ones.