We are only as blind as we want to be.
You cannot force someone to pay attention to something that they do not want
to notice. There's none so blind as those who will not see.
It is simply too big... too much for you to handle and you just close your eyes and pretend it isn't happening. The overwhelming situation may be something in your own life, diagnosis of an illness, job loss, uncontrollable debt, something major that is just too much to fathom.
Or, it could be an acquaintance that has shared some information about their troubles, and you don't want to get involved.
As with everything, it is a choice. You choose whether or not to see what is going on. Sometimes things are unthinkable, you're unable to justify what is happening, it doesn't make sense, so you deny it.
"The human mind has a primitive ego defense mechanism that negates all realities that produce too much stress for the brain to handle. It’s called ." Dan Brown 'Inferno'
So when you are feeling like this what can you do? It is acceptance and trust. Accept the situation for what it is, don't run away, or turn a blind eye. Look at it, and accept that this is what is happening. This is the way it is. It may hurt but it has to be dealt with. Trust yourself, have faith and take it one step at a time. Give yourself some credit. You can handle it and you are not alone.