Pluralitas non est ponenda sine necessitate. A plurality (of reasons) should not be posited without necessity.

With all things being equal, the simplest explanation tends to be the right one.

Entities must not be multiplied beyond 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.

Plurality is not to be posited without necessity.

Entia non sunt multiplicanda praeter necessitatem

Entities are not to be multiplied beyond necessity.