He begins like most psalmists stating that the Lord's fame and power are known first in what He has done and in Creation. :) What is also cool is verses 6-10 could be references to the Flood. "The ancient mountains crumbled and the age-old hills collapsed" Tetonic activity might have leveled older mountain ranges and made new ones. "You split the earth with rivers, the mountains saw You and writhed torrents of water swept by; the deep roared and lifted the waves on high" Ok, that is definitelya reference to the Flood, and taking the previous verses in context what that, it is interesting that Habbakuk points to the Flood as evidence of God's power and judgement because he is writing this to warn the Israelites of the impending captivity.
Verses 11 - 16 could talk about the end-times. "You crushed the leader of the land of wickedness, you stripped him from head to foot." That could refer to the time Nebuchadnezzar was owned by God and made to EAT GRASS or could refer to God's ultimate defeat of Satan, of whom God says will get his FACE CRUSHED. The threshing of the nations indicates end times because God would separate His people from the ones that didn't call upon Him for salvation.
Then we get to verses 17-19 which people quote all the time. "Though the fig tree does not bud and there are no grapes on the vines, though the olive crop fails and the fields produce no food, though 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. The Sovereign Lord is my strength; He makes my feet like the feet of a deer, He enables me to go on the heights." Knowing that God is powerful enough to create the whole Earth and flood it; Knowing God will crush Satan and the nations and save His people is security enough for Habbakuk. Though every main source of revenue in his country is ruined, he doesn't panic because God is on his side and is in control of all of it.
Do I believe that? Haha... sometimes. I get the theological significance, but the times when I'm not offered a job and feel powerless and feel like I'm abandoned, I tend to say some not-so-nice things to God and come very close to slamming the door in His face and give up. These are the times when I realize that I have a 1/10th of mustard-seed faith in this area. It's there. I know it's there, but I still get shaken when stuff doesn't work out.
What do I need to do? Realize God has me where He has me both in circumstance and geographical location for His reasons. If I need to leave Fort Collins and go elsewhere, He will work in it. Even if I leave with the attitude of, "Whatever. I'm done trying to fight to stay in Fort Collins. I'm outta here. I'm using my degree in a career-type job and that's my life." God is still sovereign. I might have to eat grass at some point (figuratively speaking) if I held onto that attitude long enough. Or If I leave trusting God has finished the work He has me here in Fort Collins to do and trust He has something for me closer to Mom / Grandma / and my other relatives, I can believe God is sovereign and that His plan will work out. Keeping in mind that God is powerful over His creation ( me included), and all governmental, corporate, economic powers helps me understand that He is ultimately in control and can be trusted with any economic /political /other factors affect my circumstances. Thus, I can say with more and more confidence (as I learn this in a deeper way), "Though the currency devalues, though employment rates do not rise, though economic power shifts from my nation, and the people are overwhelmed with taxes, though our debt to other nations increases, yet I will rejoice in the Lord, I will be joyful in God my Savior. The Sovereign Lord is my strength and my ultimate worth and value; He makes me feet like the feet of a deer, He enables me to continue climbing on the heights." Altered version of Habbakuk 3:17-19.