Laymen and clerics when not consecrating are not obliged, by any divine precept, to receive the sacra- ment of the Eucharist under both species ; and it cannot by any means be doubted, without injury to faith, that communion under either species is sufficient for them unto salvation. For although Christ, the Lord, in the Last Supper, instituted and delivered to the apostles this venerable sacrament in the species of bread and wine, that institution and delivery do not thereby signify that all the faithful of the Church are bound, by the institution of the Lord, to receive both species. But neither is it rightly gathered, from that discourse which is contained in the sixth chapter of St. John, COMMUNION UNDER ONE SPECIES 41 however it be understood by the various interpreta- tions of holy Fathers and Doctors, that the communion of both species was enjoined by the Lord ; for he who said : Except you eat the flesh of the Son of Man and drink his blood, you shall not have life in you, also said : He that eateth this bread shall live for ever ; and he who said : He that eateth my flesh and drinketh my blood hath everlasting life, also said: The bread that I will give is my flesh for the life of the world ; and, finally, he who said : He that eateth my flesh and drinketh my blood, abideth in me and I in him, said, nevertheless : He that eateth this bread shall live for ever. [Session 21, Chap. 1.]