Enquire: 'Who am I?' and you will find the answer. Look at a tree: from one seed arises a huge tree; from it comes numerous seeds, each one of which in its turn grows into a tree. No two fruits are alike. Yet it is one life that throbs in every particle of the tree. So, it is the same Atman everywhere.
All creation is that. There is beauty in the birds and in the animals. They too eat and drink like us, mate and multiply; but there is this difference: we can realize our true nature, the Atman. Having been born as human beings, we must not waste this opportunity. At least for a few seconds every day, we must enquire as to who we are. It is no use taking a return ticket over and over again. From birth to death, and death to birth is samsara. But really we have no birth and death. We must realize that.