People assume that time is a strict progression of cause to effect, but *actually* from a non-linear, non-subjective viewpoint - it's more like a big ball of wibbly wobbly... time-y wimey... stuff.
If we choose only to expose ourselves to opinions and viewpoints that are in line to our own, we become more polarized, more set in our own ways. It will only reinforce and deepen the political divides in our country. But if we choose to actively seek out information that challenges our assumptions and beliefs, perhaps we can begin to understand where the people who disagree with us are coming from.
I was always puzzled by the fact that people have a great deal of trouble and pain when and if they are forced or feel forced to change a belief or circumstance which they hold dear. I found what I believe is the answer when I read that a Canadian neurosurgeon discovered some truths about the human mind which revealed the intensity of this problem. He conducted some experiments which proved that when a person is forced to change a basic belief or viewpoint, the brain undergoes a series of nervous sensations equivalent to the most agonizing torture.