“There is no track in the sky, and no true seeker looks outside oneself for liberation. The world delights in worldly attachments, but the Tathagatas are free from all attachments.”
Canonical Pali Original: Ākāse padaṃ natthi, samaṇo natthi bāhire; Papañcābhiratā pajā, nippapañcā tathāgatā.
— Gautam Buddha
The Awakened One, Founder of Dhamma
Pali Canon: Dhammapada 18.254 on internal self-realization versus external rituals.