St. Tikhon of Moscow on Heterodox Sacraments

St. Tikhon of Moscow 1865-1925

They have separated themselves from the unity of the Ecumenical Church and are deprived of God’s grace, which abides in Christ’s Church… And all the actions and sacraments performed by the bishops and priests who have fallen away from the Church are without grace; while the faithful who take part with them in prayer and sacraments not only do not receive sanctification, they are subject to condemnation for taking part in sin. (Acts of His Holiness Patriarch Tikhon and the Latest Documents about the Succession of the Highest Church Authority: 1917-1943, editor Archpriest Vladimir Vorobiov et al., compiled by M.E. Gubonin [Moscow, 1994], 291)

http://www.pravoslavie.ru/english/70565.htm