Commentaries:
The righteous do not exalt themselves. God will promote them; He will exalt them when it is the proper time. In the meantime, it is best for all of us to be content with where He has put us. We do not need to go to the lengths of Korah or Diotrephes to be presumptuous—we can be presumptuous anytime we take something upon ourselves that has not been given to us to do, thinking that we know better. Such a thing is just plain pride.
The cure for presumptuous behavior is realizing what God has given us, where He has placed us, and what is best for us at the time. If we work within the parameters He has set for us, we will grow, and we will perform the task He has asked us to do.
Richard T. Ritenbaugh
Countering Presumptuousness