The depiction on the shoulder of grape leaves and fruit clusters cause me to think that the person on the discus of the lamp is possibly holding a cutting. As I understand it, grape vines are propagated from cuttings as trying to reproduce a plant from the seeds is very haphazard. Therefore a select and highly desired vine is first identified and then further produced by slips or cuttings. Though this is a Greek oil lamp, I am reminded of the verse in Psalm 80.8 “You brought a vine out of Egypt; you drove out the nations and planted it.” (NIV). It is evident that this technology of vegetative cuttings, or cloning existed for at least 3000 years.
In Jn. 15 Jesus says He is the true vine and the Father is the vinedresser. To be fruitful, a Christian needs to abide in the vine (Jesus). Doing the work of God is intrinsically connected with God’s enabling of the Holy Spirit.