Answer:
Very good question, indeed.
Let me first answer this from scripture and then from personal observation. A lot of this is probably a recap of what you have, but being a pastor I am including scripture references, etc since I know it is important to provide scriptural prrof and basis for all we say and do.
Anoint means literally to smear or rub in with oil or some other substance. I like this word because when we have God’s anointing we literally smell like Him, are saturated with His presence, have protection (lambs were anointed with oil to ward off insects and other enemies), etc.
The scripture is clear, of course, that when we accept Jesus Christ as our personal Savior that He lives within us and the His Spirit does as well. So it is a good argument that every believer has an anointing within them once they come to know Christ. 1 Corinthians 3:16Know ye not that ye are the temple of God, and that the Spirit of God dwelleth in you?
Secondly, Baptism in the Holy Spirit literally means an immersion into His presence and Spirit so with this experience (which is separate from Salvation) we now are immersed in that anointing and it is upon us. Peter needed this empowerment to stand before thousands on the day of Pentecost.
Third, it appears according to scriptures they are certain times and places a special anointing is put upon someone to carry out a specific purpose for God. This was always the case in the Old Testament as the Spirit did not permanently stay on anyone (except for David as stated in 1 Sam 16:13). In the New Testament we find indication that there may be times of even greater working power and anointing come upon a believer as the Spirit wills…see 1 Corinthians 12 and 14.
So, to answer your question scripturally, I believe there is a difference between the anointing within the believer and the anointing upon which comes upon for specific time and purpose.
My own personal observations and experiences hold these truths to be the case. I see people who definitely have Christ within them but never seem to really impact the world around them; they live in a state of getting by but never experiencing the fullness that God would have for them. I know people that have an anointing upon them and I do believe that anointing grows through faith, prayer, obedience, service, and seeking (even coveting – see 1 Corinthians12:31) a greater of the Spirit in your life.
And yes, I have seen even anointed people be used in capacities greater than their normal calling or gifting when the Spirit seems to come upon them in an even greater capacity to accomplish the specific purpose of God.
I hope this helped and will assist in your teaching outline.
Thanks,
Pastor Brad