Your suffering is neither pointless nor isolated. Somehow, Jesus’ sufferings overflow into our lives; somehow ours are linked to his. This is a great honor. It grants our sorrows an incredible dignity; it invites us to know an intimacy and connection with Jesus in them, because of them. The sufferings of Jesus are the noblest part of his life story; the cross, the crown of thorns. What an unspeakable honor that he would share even this with us. This fellowship is a treasure we have not tapped into but one we will need.
When his suffering overflows into our lives, God’s promise is that his comfort will overflow to us as well. We can cry out for the comfort of God. Whatever your circumstances may be, he will heal your wounded heart; he will comfort. Cling to him. “My soul clings to you; your right hand upholds me” (Ps. 63:8). He is with you now. For his name is Faithful and True.
So this is what Hebrews is trying to say: Do not lose heart because of your suffering; cling to Jesus.