Life changing experiences are an important part of life.  You have a choice to look at each with a positive or negative attitude.  Granted, if something negative comes your way, it may take a bit for you to "adjust" yourself to the right frame of mind before you can see anything positive in it.  If we trust God and know that He has our best interest at heart, then we WILL see something positive or beneficial in all our experiences. Sometimes, something we are going through might be to benefit someone else.  Sounds crazy, doesn't it?  Yet  if we are not dealing with it in a positive way, then we will surely be of no benefit to anyone else, and the whole experience will be a waste.  Easier said than done, but God never promised us an easy life; only that He would never abandon us.   And so I hold to God's Word, His promises to us.  
Philippians 4:13 "In God who is the source of my strength, I have strength for everything."