Merely having an open mind is nothing. The object of opening the mind as of opening the mouth is to close it again on something solid.

Related:

• Opening an open object is far from
  productive...
• The trouble with always trying to preserve the health of the body is that it is so difficult to do without destroying the health of the mind.
  G. K....
• Nothing worth knowing can be understood with the mind .
  everything really valuable has to enter you through...
• To downgrade the human mind is bad theology. -- Gilbert K.
  Chesterton (1874...
• An open mind is wonderful if matching mouth not
  included...
• Fellow with closed mind often has open
  mouth...
• Open your mind before you open your
  mouth...
• Fundamentalism means never having to open
  your mind...
• Quick!
  Close your mind Something might get in...