Rejoice or Die

Lately i have been more and more exhorting myself with my mantra/motto, Rejoice or Die. I realize it sounds pretty dramatic but here is my logic (a.k.a. my interpretation of scripture) behind it.

Paul tells us over and over in the the New Testament to sew to the Spirit and rejoice in all circumstances:

For the one who sows to his own flesh will from the flesh reap corruption, but the one who sows to the Spirit will from the Spirit reap eternal life. And let us not grow weary of doing good, for in due season we will reap, if we do not give up.
Galatians 6:8,9

Finally, my brothers, rejoice in the Lord. To write the same things to you is no trouble to me and is safe for you.
Philippians 3:1

Rejoice in the Lord always; again I will say, Rejoice.
Philippians 4:4

Rejoice always, pray without ceasing, give thanks in all circumstances; for this is the will of God in Christ Jesus for you.
1 Thessalonians 5:16-18

It seems to me that if Paul was so intent on us rejoicing in all circumstances, there must have been an urgent reason. If i do not rejoice, my proclivity is toward bitterness or self pity which is sinfully thinking i deserve better than what God has given me. This is sinful because God tells us that by His divine power, God has given us everything we need for life and godliness (2 Peter 1:3) which includes any suffering He deems necessary. Rejoice not in the suffering but in the result of the suffering after God has done His work!
Choosing not rejoice may lead to bitterness to which i apply:

Abstain from every form of evil.
1 Thessalonians 5:22

Then desire when it has conceived gives birth to sin, and sin when it is fully grown brings forth death.
James 1:15

These passages - and knowing my heart - bring me to the conclusion that not rejoicing may easily lead to bitterness (desiring 'better' than my portion) which is a form of evil. It is sin and sin fully grown leads to death. So really, it takes only three steps to go from rejoicing to death. I guess that is why i take it so seriously as (i believe) Paul did too.

Finally, my brothers, rejoice in the Lord. To write the same things to you is no trouble to me and is safe for you.