Heaven is the goal of ultimate happiness and peace, of joy and comfort and of fulfillment and bliss. So let us consider is that what you would want? If thoughts of peace and bliss do not appeal to you or are repugnant to you, than you are most likely not going to want to go there when you have shucked this mortal coil. Heaven is not a place that those who do not prefer it can just walk on in. No you must be prepared. You must be able to bear that state of being of which heaven is made.
Just like any state of being whether depression or elation its effects are demanding and even draining to those whose durability toward that state is less than conditioned. And that is what life here on Earth is, the conditioning of each one to bear the ultimate bliss.
So how does Jesus condition us? With tolerance of others, enduring hardships and emotional stresses and by challenging our resolve with temptations. Our life on Earth is the place to prepare us to be able to tolerate the glory of entering into HIS Rest.
So the next time you are challenged by discomfort or adversity remember that there is a point to all of this and that is to prepare you for the most glorious bliss beyond what you can imagine. Take up thy cross and follow ME, because you may still have a ways to go yet.