The struggle to maintain an open mind works best as a balance between your ideas and the ideas of other. You analyze the words, images, and sign of the times against your paradigms. Honest conclusions resulting from these mental exercises, is a productive means for developing an open mind.
When you view the actions and words of others, you must be careful to filter out the honesty of their presentations. Always look behind their ideas and words. Make sure they are not promoting an agenda. That their windows do not have hidden curtains, attempting to mislead you to their way of thinking. An open mind includes the ability to separate honest difference of ideas versus propaganda.