The best way to attain Buddhahood is to encounter a good friend,
How far can can our wisdom take us,
If we have even enough wisdom to distinguish hot from cold,
We should seek out a good friend,
But encountering a good friend is the hardest possible thing to do,
For this reason, the Buddha likened it to the rarity of a one-eyed turtle finding a floating log with a hollow in it just the right size to hold him,
Or to the difficulty of trying to lower a thread from the Brahma heaven and pass through the eye of a needle on the earth.
(Credit Daisaku Ikeda for the philosophy)