Here's another thing to consider -- Hebrews 4:3-5 says:
3 For we who have believed enter that rest, just as He has said, "AS I SWORE IN MY WRATH, THEY SHALL NOT ENTER MY REST," although His works were finished from the foundation of the world. 4 For He has said somewhere concerning the seventh day: "AND GOD RESTED ON THE SEVENTH DAY FROM ALL HIS WORKS"; 5 and again in this passage, "THEY SHALL NOT ENTER MY REST."
I have often wondered about this idea of God's work being finished. A commentary I read (sorry I can't remember which one it was!) pointed out that, in John 5:17, Jesus says "My Father is always at his works to this very day, and I, too, am working," when questioned as to why he was doing things on the Sabbath. What these verses suggest is that God's creative work was finished on the 7th day of creation (note, in the creation story, that Moses does not say there was an end to the 7th day - so God's work is still finished, and He is still resting). However, His works of compassion, of grace, of mercy, are still happening. God is still "loving on us" in all our sinfulness. But - notice this big point - He work is finished. All God was going to create and accomplish throughout human history is done. There is nothing He gets "surprised" by, nothing He has to "fix" as a result of our sinfulness. In fact, our sin is not a "stumbling block" for His plans -- it is the very means through which (not BY which) He accomplishes them . . .
So, how does this all relate to trials and tribulations? God will use even these trials to demonstrate His love to us. And, not only that - this is the best way for Him, in this situation, to demonstrate His love. I do not completely understand all of this . . . but I know God is sovereign, and He will bring love, peace, healing, and a deeper vision of His glory, through all of this. Even trials such as these, which seem senseless and incomprehensible. Again, I am thankful to serve a Sovereign God.