Going back to the question asked in Part 1 of this article ... Why don't we see the manifestation of God's power working in our lives? 

When we speak words other than God's words, we diminish the power of His Word that we speak.  When we speak those "other" words, we are putting more faith in those words than we do in God's words.  We must mix our faith in with speaking the Words.  The ACTIVATOR, then of the POWER is FAITH ... not that the power in the Word changes.  God's Word is still absolute power..  

Hebrews 4:1-2 .... Let us be on our guard lest perhaps, while He still leaves us a promise of entering into His rest, any one of us could be found to have failed to obtain it.  (talking about not mixing faith in with the Word).  But the Word failed to benefit us because we were not united by faith with those who did give heed to it.  We, who have believed are to be admitted to that rest ... the power of God manifested in our lives. 

Reverend Robert W. & Mary C. Butler