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This is not something I am currently prepared to swear by, but it is rather a provisional belief or -- if you wish -- a "working hypothesis". Thus, it is my hunch that enlightenment simply cannot be attained to by accumulating beliefs.
Again, no matter how truthful, accurate, or profound one's beliefs are, they are at best pointers that head you off in the right direction. Once you have used them as such, you should discard them, for they easily become walls between you and enlightenment when clung to. Treat beliefs like a Zen monk: As fingers pointing to the moon, but do not treat them as the moon.
Beyond that, the desire for enlightenment works against you just as much or even more than do beliefs. Desire strengthens the walls between you and enlightenment. Paradoxically, the more you desire enlightenment, the less likely you are to find it. Or if you find something, it will be a delusion you have created for yourself, and which will not have the same consequences for you as genuine enlightenment.
Perhaps the most fruitful attitude or spirit in which to seek enlightenment is not to seek it at all. Rather, treat it like Rumi treats love. “Your task is not to seek for love, but merely to seek and find all the barriers within yourself that you have built against it.”
Failing that -- or perhaps in conjunction with it -- cultivate your curiosity about enlightenment. Not your beliefs, but your curiosity. The two things are often incompatible. The more firmly you believe something, the less genuinely curious you are about it. The more your curiosity is confined to a box by your belief, rather than being allowed to roam and wander freely, the less effective and efficacious it is. As Jiddu Krishnamurti said, "You cannot inquire if you are anchored in a belief."
There are no guaranteed paths to enlightenment, but the path of curiosity, the path of free-spirited inquiry -- is perhaps the surest.
All that I have said above is provisional, tentative, uncertain.