You reason about salvation, yet you do not know what salvation is, why men are in need of it, and finally, you do not know Christ, the only means of our salvation. … You must know Christ! You must realize that you do not know Him, that you deny Him if you acknowledge salvation possible without Him for any kind of good works! He who acknowledges salvation to be possible without Christ denies Christ and, perhaps without knowing it, falls into the grave sin of blasphemy. … To be sure, you had a revelation from above on this subject, concerning what is contrary and what is not contrary to Divine mercy? — No, it was sound reason that pointed it out. Ah, your sound reason! Still, where in your sound reason did you find out that it was possible to understand, with your own limited human mind, what is contrary and what is not contrary to the Divine mercy?
St. Ignatius (Brianchaninov)