how to say 旁观者清 in English?

Bystanders understand

onlooker

旁观者清The onlookers see most clearly.

Lookers－on see more than players.

Lookers-on see more than players 当局者迷，旁观者清。
旁观者 outsider

standers-by see the whole and best plays .

来点不同的~~Outsiders has a bright seeing of the game.