Why Do We Miss The Obvious?

The mind can be "unseeing." I mean, we can miss some obvious things in life even right in front of our eyes. What could be a possible explanation? I believe, as imperfect humans, we all have psychological weaknesses that prevent us from seeing everything. The stronger and more stable we are mentally, emotionally, physically, and spiritually, the better we could override these innate human weaknesses. When constricted or hurt, go for "renewal of the mind." It helps get rid of the blind spots.