Impatience a symptom of unbelief?

Today I googled this week's Bible verse and found this sermon by John Piper. I have listened to several sermons in this series before and loved them.  They adress the heart of several issues that Believers face and not just attach the symptoms- which is right up my alley [ the heart not the symptom]. 

This sermon is available to down load, listen online, or read in manuscript form.