Clergy vs Laity

The Abolition of the Laity by R. Paul Stevens
'...in the 2nd and 3rd centutries a definite clergy-lay distinction arose largely from three influences: (1) imitation of the secular structures of the Greek-Roman world not unlike the professional-lay distinction in the modern world; (2) the transference of the Old Testament priesthood model to the leadership of the church; (3) popular piety which elevated the Lord's Supper to a MYSTERY which required priestly administration' (p39)

VS

Priests in a People's Church by George Guiver et al
'When Christian ministers lead us in the Eucharist, they are leading us into MYSTERY...' (p29)