Nature of All Beings

“O good man! One who acts good is the “true thinking.” The true thinking is compassion. Compassion is the Tathagata.
O good man! Compassion is the bodhi path; The bodhi path is the Tathagata. The Tathagata is compassion.
O good man! Compassion is Great Brahma. Great Brahma is compassion. Compassion is the Tathagata.
O good man! Compassion acts as parent to all beings. The parent is compassion. Know that compassion is the
Tathagata.
O good man! Compassion is the Buddha Nature of all beings. Such a Buddha Nature is long overshadowed by illusion.
That is why beings cannot see. The Buddha Nature is Compassion. Compassion is the Tathagata.”

Buddhism
Mahaparininirvana Sutra

Wilson, Andrew, editor. World Scripture - a Comparative Anthology of Sacred Texts. Paragon House, 1991, p. 89 [Mahaparininirvana Sutra 259].