Believe nothing because a wise person said it. Believe nothing because it is generally held. Believe nothing because it is written. Believe nothing because it is said to be Divine. Believe nothing because someone else believes it. But believe only what you yourself judge to be true.
A virtuous man or woman who is determined to develop the Supreme Enlightened Mind, should thus develop it: I have to lead all living beings to put a stop to (reincarnation) and escape (suffering), and when they have been so led, not one of them in fact stops (reincarnating) or escapes suffering. Why? Because, if a Bodhisattva believes in the notion of an ego, a personality, or a living being, he is not a true Bodhisattva.
Since it is impossible to escape the result of our deeds, let us practice good works. Let us guard our thoughts that we do no evil, for as we sow so shall we reap. There are ways from light into darkness and from darkness into light. There are ways, also, from the gloom into deeper darkness, and from the dawn into brighter light. The wise man will use the light he has to receive more light. He will constantly advance in the knowledge of truth. Exhibit true superiority by virtuous conduct and the exercise of reason; meditate deeply on the vanity of earthly things, and understand the fickleness of life. Elevate the mind, and seek sincere faith with firm purpose; transgress not the rules of kingly conduct, and let your happiness depend, not upon external things, but upon your own mind.
"May all beings everywhere plagued with sufferings of body and mind quickly be freed from their illnesses. May those frightened cease to be afraid, and may those bound be free. May the powerless find power, and may people think of befriending each other. May those who find themselves in trackless, fearful wilderness-- the children, the aged, the unprotected-- be guarded by beneficent celestials, and may they swiftly attain Buddhahood." â€” The Buddha