Baptism does not profit a man outside unity with the Church ... For many heretics also possess this Sacrament but not the fruits of salvation ... The benefits which flow from Baptism are necessarily fruits which belong to the true Church alone. Children Baptized in other communions cease to be members of the Church when, after reaching the age of reason, they make formal profession of heresy, as, for example, by receiving communion in a non-Catholic Church.
Saint AugustineConsequently, heretics and schismatics, separated from the unity of this Body, are able to receive the same Sacrament, but with no benefit to themselves; indeed, more to their own harm, in that they are judged the more severely rather than being liberated.
Saint AugustineYou have been professing yourself reluctant to throw off your load of illusion because truth was uncertain. Well, it is certain now, yet the burden still weighs you down, while other people are given wings on freer shoulders, people who have not worn themselves out with research, nor spent a decade and more reflecting on these questions.
Saint AugustineIt is impossible that there should be inhabitants on the opposite side of the Earth, since no such race is recorded by Scripture among the descendants of Adam.
Saint Augustine