The root cause of our cyclic existence in samsara is clinging to an inherently existing self wherefrom greed, hatred and delusion arise. Such clinging makes one concern just for one’s own benefit and work only for the well-being of oneself. Without it, selfish thoughts will not arise, neither will the ensuing deeds.

- Quote from The Right View, "The Four Noble Truths—the Path Out of Samsara"