You shall receive power when the Holy Spirit has come upon you. Act 1:8
If there ever was a group who should have been able to live a consistent Christian life by just doing their best, it was the apostles. Think of all their advantages. they had been trained by the Master. They had seen lame men walk, blind men see, and the dead rise... They had even performed miracles themselves!.. Yet in their last encounter with the Savior, He let them know that they were still missing something... They would need more than their human spirit to carry them... They needed the Holy Spirit.
~Charles F. Staney