“Keep an open mind. Only an open mind is big enough to contain the secrets of the universe.”
“Keep an open mind; it's the only way new things can get in.”
“Keep an open mind, but no so open that your brains fall out”
“They don't understand it. They're not old enough to know the first instinct of irritation should be avoided in order to keep an open mind.”
“It pays to keep an open mind, but not so open your brains fall out.”
“Always keep an open mind and a compassionate heart.”