Do not go upon what has been acquired by repeated hearing; nor upon tradition; nor upon rumor; nor upon what is in a scripture; nor upon surmise; nor upon an axiom; nor upon specious reasoning; nor upon a bias towards a notion that has been pondered over; nor upon another’s seeming ability; nor upon the consideration, “The monk is our teacher.” But when you yourselves know: “These things are good; these things are not blamable; these things are praised by the wise; undertaken and observed, these things lead to benefit and happiness,” enter on and abide in them."

Source: Siddhartha Gautama (aka Buddha), Kālāma Sutta