Thoughts on heaven

As I have, of late, been thinking through the reality of the spiritual aspect of man, it has occurred to me that we actually know so little in this regard.  This thought led me to consider how incapable we most likely are of conceiving what eternity will be like.  In other words, I find it highly likely that we do not understand (at best), or are actually incapable of (at worst) comprehending eternity in the presence of God.
The way I see it, from the day we are born, almost every aspect of our lives is centered around the temporal. We eat healthy, we exercise, we go to school, to university and to work, all in the name of earning a good living and enjoying life.  But we pretty much ignore the spiritual side.  So it should come as no surprise that we would be completely ignorant of, or even incapable of, perceiving eternity.
I think that spiritual things are so foreign to us because we have almost nothing in our lives that moves us in that direction.  Even most churches focus simply on morality.  So to think about and formulate ideas about spiritual existence is beyond us. 
Someone said to me once, "I think eternity would get boring.  It would just go on forever."  While I can understand where they are coming from, their statement only makes my point.  If we understood our own spiritual nature, I don't believe we would ever conceive of being bored with the presence of God.  You cannot speak of that of which you have no point of reference.  If we put no effort towards experiencing or living spiritually, we cannot conceive or think of such a life.
I'm afraid for a lot of people.