Go ahead and be joyous all the time. “Sin and sin boldly”, Martin Luther.
Sometimes, there is no perfect action or sinless choice. Do you permit an evil government to continue or do you fight that government?
Romans 13:1 "Let every person be subject to the governing authorities. For there is no authority except from God, and those that exist have been instituted by God."
If you are going to oppose the evil government, then you would be following Martin Luther's advice to "sin boldly". When there is no perfect choice, make a decision and follow through.
Martin Luther was not the type of person who’d say, “On the one hand, this . . . on the other hand, that. Let me just clarify what I said so nobody will take offense.” If he had been, we might not have had a Reformation.
He often used hyperbole that made his opponents demonize him and sent his proponents scrambling to demonstrate from his other writings what he really meant. But his words never got lost in the white noise.
This is what he said: “God does not save those who are only imaginary sinners. Be a sinner, and let your sins be strong (sin boldly), but let your trust in Christ be stronger, and rejoice in Christ who is the victor over sin, death, and the world.”
What on earth could he have meant by that? Is he saying, like many Christians believe today, that the Cross covers continued, willful sin that we refuse to surrender? No, he is not. How do I know this? By interpreting those words in the context of his whole theology. He said elsewhere: “If you do not give forth such proofs of faith [good works], it is certain that your faith is not right. Not that good works are commanded us by this Word; for where faith in the heart is right, there is no need of much commanding good works to be done; they follow of themselves. But the works of love are only an evidence of the existence of faith.” (Italics added.) Although Luther stressed that we are saved by faith alone, faith by its very nature produces good works. The idea that a person can be saved while continuing on exactly like before is a dangerous misunderstanding of both the Apostle Paul and Luther.
So what, then, did he mean? He is talking about the power of the Cross to forgive and heal all sin. Real sin, not just the imaginary kind where deep down we feel that we were justified.
http://graceandmiracles.blogspot.com/2009/10/why-did-martin-luther-tell-us-to-sin.html
Not my words, look it up.