"In yielding our physical members we no longer seek even to understand intellectually what God asks of us. We merely hand over unreserved control of our physical members and allow God to use them according to His own will and purpose.
The particular member He takes full control of is that unruly member that no man can tame - the tongue. Thus the yielding of our tongue to the Spirit marks the climax of yieldedness, of surrender, of complete obedience. It is by this we receive the gift of the Holy Spirit".
Derek Prince - "Foundational Truths for Christian Living" - (2006) Charisma Press - p233.