Rejoice in the Lord

Habakkuk 3:1-19
Lord, I have heard of your fame; I stand in awe of your deeds, O Lord.
Renew them in our day, in our time make them known; in wrath remember mercy.
You came out to deliver your people, to save your anointed one. You crushed the leader of the land of wickedness, you stripped him from head to foot.
Yet I will wait patiently for the day of calamity to come on the nation invading us.
Though 1)the fig tree does not bud and 2)there are no grapes on the vines, though 3)the olive crop fails and 4)the fields produce no food, though 5)there are no sheep in the pen and no cattle in the stalls, yet I will rejoice in the Lord, I will be joyful in God my Savior.
Habakkuk's prayer comes with a great sigh of relief. God, his strength and joy, is God after all!
The prayer is a psalm, to be sung with accompanying instruments. This has led some to believe that Habakkuk was a Levite, attached to the Temple.
Why?
Habakkuk sees the inevitability, the fury of judgment. Yet, though it means the loss of every good thing in life, God is still to be trusted. The prophet will wait for the day when God deals with the invader. He will rejoice in God, though life is stripped of all that fives natural joy and satisfaction.
After God's reply, Habakkuk realized God always watching doing something, yet we don't know. His righteousness is exist for ever.
How?
Rejoice in the Lord, no matter what happened to me!