On Opus Operatum

"This means that the church is a sign of salvation, and is not simply salvation itself. But insofar as the church is the continuation of God's self-offer in Jesus Christ in whom he has the final, victorious and salvific word in the dialogue between God and the world, the church is an efficacious sign." 

- Karl Rahner, Foundations of Christian Faith

On Calvin On St. Augustine On Romans 3:21

Calvin on St. Augustine on Rom 3:21 

"It is not unknown to me, that Augustine gives a different explanation; for he thinks that the righteousness of God is the grace of regeneration; and this grace he allows to be free, because God renews us, when unworthy, by his Spirit; and from this he excludes the works of the law, that is, those works, by which men of themselves endeavor, without renovation, to render God indebted to them."

 - John Calvin, Commentary on Romans

On Linguistic Puzzles

"I have a telephone conversation with New York. My friend tells me that his young trees have buds of such and such a kind. I am now convinced that his tree is... Am I also convinced that the earth exists?" 

- Ludwig Wittgenstein, On Certainty