“We want to be open-minded enough to accept radical new ideas when they occasionally come along, but we don't want to be so open-minded that our brains fall out.”
“Keep an open mind, but no so open that your brains fall out”
“It pays to keep an open mind, but not so open your brains fall out.”
“By all means let's be open-minded, but not so open-minded that our brains drop out.”
“Do not be so open-minded that your brains fall out.”
“Things we were going to do are now being done by others. They were, it seems, not in our minds to do (were we or they out of our minds?) but simply ready to enter any open mind, any mind disturbed enough not to have an idea in it.”