When you are walking powerfully in your walk with God, there WILL be “overflow” in your life. Your passion and zeal will “overflow” and others will be able to see it. You can’t help but to talk about the exciting things that He is doing with you. The words that He has spoken to you. His heart stance towards you and others. THAT is ”overflow.”
A “lukewarm” Christian usually doesn’t have a lot of “overflow” happening in their life because they don’t have a depth to their relationship with Christ. You will know the ones who DO when you see them. There is a fire in their bones, and their walk is made evident to those around them. “Fire” spreads quickly, and all it takes is one person to truly get set on fire for the Lord and to begin to walk in the “overflow” on their life for MANY other lives to be affected. Live in the overflow today, my friends. You were made for so much more. 
