Devibhagavatapurana 4.15.58

4.15.58

niḥspṛhaḥ ko'pi saṃsāre na bhavenna bhaviṣyati |
śaśinātha gurorbhāryā hṛtā jñātvā balādapi ||

O Goddess! This whole Universe, moving and unmoving is selfish; hence arise so many differences between several opinions. There was no one unselfish in this world and there would be no unselfish persons born hereafter.