There are a pair of verses in the bible that I think should make us as Christians very humble and very thankful people.
James 1:17 New American Standard Bible (NASB)
17 Every good thing given and every perfect gift is from above, coming down from the Father of lights, with whom there is no variation or shifting shadow.
Romans 8:28 New American Standard Bible (NASB)
28 And we know that God causes all things to work together for good to those who love God, to those who are called according to His purpose.