Anointed by God to teach deeper things given by Spirit, not mere letter of the word, doctrine, or exposition of scriptures. Servant and ministry of reliable and spiritual men who serve the body of Christ in many ways where the needs arise. One may study Bible more. Overseer is the same Greek word Bishop. Also called Elder which is the same position as Bishop and Presbyters.
Pastor is the Greek word for shepherd.
Bishop indicates the character of the work undertaken as overseer or guardian. Shepherd or Pastor indicates the function or responsibility of watching, teaching, and guiding the flock. The work of the Deacon is not explained in the Bible. The definition of the word deacon is servant. The deacon is not ruler in church but a helper.