According to Osho, there is nothing to "fall into"—either you know or you do not, and not-knowing is even better. "I don't know" is the peak of wisdom: innocence. Do not accept it grimly; celebrate it. Drop the burden of borrowed knowledge, rejoice in openness, laugh, and live freshly. Rename not-knowing as innocence, and acceptance ceases to be a problem.
Stop trying to accept "I don't know"; enjoy it like a curious child, and life becomes lighter and happier.