And for their sakes I sanctify Myself, that they also may be sanctified by the truth. John 17:19
But sanctify the Lord God in your hearts: and be ready always to give an answer to every man that asketh you a reason of the hope that is in you with meekness and fear… 1Peter 3:15
Our LORD continuously sanctified Himself, which is why He did not sin, even though He was tempted (Heb. 4:15). The saint who sanctifies the Father and the Son in their heart does not sin.
….In your hearts.. : it’s something deep in our heart between us and the Father, a continuous ‘separation’ or distinction dividing between our will and His will, and thus we yield our will to His. The yielding is sanctification.
As a real member of Christ’s Body, with Jesus Christ in you, you can’t live one hour without this spiritual process being evident. Those outside have no clue what we’re talking about.
Jesus’ sanctifying Himself to the Father was foundational to His life in relation to His Father, deeper than striving against sin and temptation, though, He did do that, resisting sin even to the shedding of blood.
See how essential a belief in the Persons of the Godhead, One God in three Persons, is? How Jesus lived can only be understood in such terms, and, therefore, the true Christian life can only be understood, received and LIVED on the same basis and terms : Jesus lived by the Father and yielded Himself completely to His Father ; we live by Jesus, and should yield ourselves completely to Him, daily, and our access to the Father is thru and in the righteousness of the Son, His finished work, who perfected us forever, we, who are being sanctified.
Ian Vincent 
March 20, 2009 at 12:13 am
Yielding to the Father’s will doesn’t necessarily imply a struggle. When we walk with Him by faith then His will is daily revealed to us, moment by moment, and this requires a response from us of yielding, by faith. It may be so ‘natural’ to us as new creatures in Christ that we barely register in our mind that we are yielding to the will of another ; so much incarnated into us that we can barely distinguish any more between His will and our ‘new heart and spirit’.