Aupmanyav
Be your own guru
For me, one has been Buddha's Kesamutti Sutta (Kesamutti Sutta - Wikipedia):
- Do not go upon what has been acquired by repeated hearing (anussava),
- nor upon tradition (paramparā),
- nor upon rumor (itikirā),
- nor upon what is in a scripture (piṭaka-sampadāna)
- nor upon surmise (takka-hetu),
- nor upon an axiom (naya-hetu),
- nor upon specious reasoning (ākāra-parivitakka),
- nor upon a bias towards a notion that has been pondered over (diṭṭhi-nijjhān-akkh-antiyā),
- nor upon another's seeming ability (bhabba-rūpatāya),
- nor upon the consideration 'The monk is our teacher (samaṇo no garū)'
- Kalamas, when you yourselves know 'These things are good; these things are not blameable;
these things are praised by the wise;undertaken and observed, these things lead to benefit and happiness,' enter on and abide in them.