Entities are not to be multiplied beyond necessity.

The explanation requiring the fewest assumptions is most likely to be correct.

What can be explained by the assumption of fewer things is vainly explained by the assumption of more things.

Plurality is not to be posited without necessity.

My God is the green tide in the spring leaves the redness of cherries high in the air the excitement of shooting stars the song of birds in summer branches the sunrise on a winter's morning the name of everything we don't understand.

Of two equivalent theories or explanations, all other things being equal, the simpler one is to be preferred.

It is vain to do with more what can be done with less.