What is THE Power of God?

Romans 1:16
New King James Version (NKJV)

The Just Live by Faith

16 For I am not ashamed of the gospel of Christ, for it is the power of God to salvation for everyone who believes, for the Jew first and also for the Greek.

• the power in Greek : Dunamis, derived from the word Dunamai, where dynamite comes from.
• http://biblehub.com/greek/1411.htm