It is normal and OK for a Christian to simultaneously be...
(1) happy and joyful, looking forward to the afterlife, and...
(2) dissatisfied and feeling uneasy about his own spiritual progress, because nothing but perfect love is owed to our Lord.
We don't have to always be giddy with a Joker-sized smile on our face, and neither must we be always be focused on our imperfections and weaknesses.
Two things we should NEVER do:
(1) Presume God's mercy.
(2) Despair of God's mercy.
