"Bretheren I count not myself to have apprehended it. But this one thing I do. Forgetting what is behind and straining toward what is ahead, I press toward the mark of the high calling of God in Christ Jesus. Let us therefore, as many as be mature, be so minded: and if in any thing you be otherwise minded, God shall reveal even this unto you. Nevertheless, whereto we have already attained, let us walk by the same rule, let us mind the same thing."
St. Paul' Letter to Phillipi, Chapter Three, Verses Thirteen Through Sixteen
Completeness does not require we finally finish everything or imply we are doomed to despair if we never satisfactorily finish anything. Completeness may not be more than the recognition there is something complete out there. We only have to chase the complete to find the happiness of compleness.
Completeness does imply unity, cohesion and coherence. If the God is the Person to be absent from the (expected, acceptable) human form can be (must be) to be present with the (God) Lord. In this manner one can escape the naked estate of judgment for the clothed condition of imputed righteousness. Righteousness becomes reality. Reality is completeness, so righteousness completes the (previously) unfulfilled man.
The joy of completeness is suggested. One feels joy in the expectation of completeness. Temporal circumstances cannot deny or effect joy if joy be that which ends in completeness.
That is, joy is in the journey only if the journey is known to end somewhere good.
Opinions expressed here are mine alone.