“Who comforteth us in all our tribulation, that we may be able to comfort them which are in any trouble, by the comfort wherewith we ourselves are comforted of God.”
King James Version (KJV)
1:4 Who comforteth us in all our affliction, that we may be able to comfort them who are in any affliction - He that has experienced one kind of affliction is able to comfort others in that affliction. He that has experienced all kinds of affliction is able to comfort them in all.
2Co 1:4 Who comforteth us in all our tribulation, etc. He who had tribulation and has learned the comfort of faith in God is best fitted to comfort others.