“And what is the exceeding greatness of his power to us-ward who believe, according to the working of his mighty power,”
King James Version (KJV)
1:19 And what the exceeding greatness of his power toward us who believe - Both in quickening our dead souls, and preserving them in spiritual life. According to the power which he exerted in Christ, raising him from the dead - By the very same almighty power whereby he raised Christ; for no less would suffice.
Eph 1:19 The exceeding greatness of his power. He prays that they may have greater knowledge of three things: (1) Of eternal life (the hope); (2) of the glorious inheritance, and (3) of God's mighty power towards believers. This mighty power works to raise them from sin, as it worked to raise Christ from the dead. However the power works, it is the same power that raised Jesus.