There is so much that could be said about grief, and what it means to grieve well as a Christian. But one of the most important things to know is that Jesus himself experienced grief and knows what that is like.
Isaiah says that He was “a man acquainted with grief, who carried our sorrows.” We cannot begin to imagine the grief that he must have felt as He “became sin for us” as Paul says. But Jesus also experienced grief during His ministry. He wept when His friend Lazarus died, and He wept over Jerusalem because the city would not come to Him. He grieved for what could have been, and was not — a tragic loss for both God and humanity.
So whenever we are grieving, one place we can always go to is Jesus’ side. He has lived our temporal existence, and understands from His own experience of being human what it means to feel a loss. We can find comfort in His presence, knowing that He knows our heart and hears our cry.