Blogger, author and pastor Tim Challies answers the burning question:
Heaven is far too perfect, far too sinless, far too other for us to imagine in our fallen minds. Our attempts to put brush to canvas have led to depictions of cherubs on clouds, idyllic colors of dawn, Christ as a blinding light, a faceless adoring throng. Some of these attempts to capture heaven’s splendors are beautiful and even captivating, yet we know they are also incomplete. They are, at best, the barest reflection of what awaits. Our imaginations must always fall short of heaven’s glorious perfections.
Revelation 21:4 assures us that in heaven God himself will wipe away our tears, that there will be no death, no sorrow, no crying, and no pain. There is a deeply comforting certainty in our future—a certainty of joy, bliss, comfort, peace, love, and perfection. However, those of us with non-believing family members and friends can find this certainty an area of intense struggle. Why? Because we know that not everyone will be there with us. Many we love today will have an eternal experience of pain, torment, and separation. How could we ever enjoy heaven if our loved ones are in hell? R.C. Sproul tackled this question at a Ligonier Ministries conference years ago and I appreciate his answer.