There is no way to explain that life is suffering to a being that has no experience of pain, nor loss, nor anxiety, nor stress... Someone who has a God's like life cannot relate to suffering directly. They may understand that "others" do suffer, but that remains an intellectual understanding.
In our existence as sentient beings we find ourselves in either of these situations:
situation 1: we are in the middle of a catastrophy.
situation 2: we are in between two catastrophies.
It is to say that situation 1 is infinitely longer than situation 2.
And also, we should note that most of us are comfortably engrossed in situation 2, and we take it for granted, we think it will last. We are not thinking that it will last like we were complete idiots, no, we know it won't last, but everyday we live we sincerely believe that it won't stop today, and that is how we delude ourselves in thinking that it'll last forever, by thinking at every moment that it will last to the next moment, to the next day.
So it is very difficult to realise our own suffering if we do not experience the plain and direct suffering of pain. We cannot see the suffering of change very well, because we do not recognize change, and we can hardly grasp at the idea of the pervasive suffering.
Yet there is one direct way to make us realize suffering is to get the clear reality that there is no difference between "me" and the "others". If the others suffer, i suffer, even if i am on cloud 9.
Call that compassion.