the true Guru

If you know what you teach, you can teach what you know, Here seership and teachership are one. But the Absolute Reality is beyond both. The self-styled Gurus talk of ripeness and effort, of merits and achievements, of destiny and grace; all these are mere mental formations, projections of an addicted mind. Instead of helping, they obstruct.
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Mistrust all, until you are convinced. The true Guru will never humiliate you, nor will he estrange you from yourself. He will constantly bring you back to the fact of your inherent perfection and encourage you to seek within. He knows you need nothing, not even him, and is never tired of reminding you. But the self appointed Guru is more concerned with himself than with his disciples.