Is not the forgiveness of all your sins– the full justification of your person– your inalienable adoption into God’s family– the complete payment of all that great debt you owed, and the assured and certain prospect of being where Christ is, and with Christ, beholding His glory forever, a well-grounded source of joy? Most truly!
Why, then, are you not a more joyful believer? Why go you mourning all your days, without one gleam of sunshine, one thrill of joy, one ray of hope, one note of praise? Is it not because you are looking to yourself and within yourself, to the almost entire exclusion of Christ and of the great and complete salvation wrought for you in and by Christ?
(HT: Of First Importance)
Already Not Yet 
I liked this excerpt… David Hulme who passed on from this life recently, had this sure foundation and hope of eternal life even in his suffering.
He had an encouraging cheerfulness..