If the priest allows himself to become transformed, truly living his role as alter Christus, then the people of God will see Christ clearly.
From the Pope Emeritus' "Letter Proclaiming a Year for Priests on the 150th Anniversary of the 'Dies Natalis' of the Cure of Ars," June 16, 2009.
Saint John Mary Vianney taught his parishoners primarily by the witness of his life. It was from his example that they learned to pray, halting frequently before the tabernacle for a visit to Jesus in the Blessed Sacrament....This way of educating the faithful to the Eucharistic presence and to communion proved most effective when they saw him celebrate the Holy Sacrifice of the Mass. Those present said that 'it was not possible to find a finer example of worship...He gazed upon the Host with immense love.'"