Day and night, night and day we spend our lives in the company of the afflictions, generating desire for the pleasant and anger at the unpleasant, and continue thus even when dreaming, unable to remain relaxed, our minds completely and utterly mixed with thoughts of desire and hatred without interruption.
To what refuge should we go? A source of refuge must have completely overcome all defects forever; it must be free of all faults. It must also have all the attributes of altruism—those attainments which are necessary for achieving others' welfare. For it is doubtful that anyone lacking these two prerequisites can bestow refuge; it would be like falling into a ditch and asking another who is in it to help you out. You need to ask someone who is standing outside the ditch for help; it is senseless to ask another who is in the same predicament. A refuge capable of protecting from the frights of manifold sufferings cannot also be bound in this suffering but must be free and unflawed. Furthermore, the complete attainments are necessary, for if you have fallen into a ditch, it is useless to seek help from someone standing outside it who does not wish to help or who wishes to help but has no means to do so.
Only a Buddha has extinguished all faults and gained all attainments. Therefore, one should mentally go for refuge to a Buddha, praise him with speech, and respect him physically. One should enter the teaching of such a being.
From Tantra in Tibet, pages 29–30