1 Corinthians 1

But God has chosen the foolish things of the world to put to shame the wise, and God has chosen the weak things of the world to put to shame the things which are mighty; v.27

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We can all fall in to one of three categories when facing our worth: either prideful, useless, or confident in Christ.  Now as much as we all wish we think the third category all the time we know that we fall in to the other two in many or certain situations.  Feeling prideful or useless is depending on human wisdom rather than on God's wisdom.  We see over and over again through out all of scripture God choosing the foolish and weak things to shame the wise and mighty.  Just think of King David who was a scrawny little brother, or Rehab who was a prostitute, or the twelve disciples who were unschooled men.
Paul is writing this letter to the believers in Corinth who were struggling with their daily life in Christ Jesus entrapped in many sins and the ways of the world.  He doesn't start off yelling at them for their sinful acts but reminds them of who they are in Christ Jesus: they are set apart as His holy ones. "God called them, not because of what they were, but in spite of what they were!" (Warren W.. Be Wise (1 Corinthians)).  The world may glory in status, position, financial success, etc, but God does the opposite that no one may boast in themselves but God alone.  It is confusing to the wise how God can use the foolish and weak in such mighty and powerful ways yet oh is it how the turtle beat the hare, the transformation a sinner to a saint, someone dead to the world who becomes alive in Christ. How have you seen God use the foolish or weak things of the world to shame the wise and might?