from the Conferences, by St. John Cassian:
Chapter 18That even good and holy men are not without sin.
But that no one however holy is in this life free from trespasses and sin, we are told also by the teaching of the Saviour, who gave His disciples the form of the perfect prayer and among those other sublime and sacred commands, which as they were only given to the saints and perfect cannot apply to the wicked and unbelievers, He bade this to be inserted:
And forgive us our debts as we also forgive our debtors.Matthew 6:12 If then this is offered as a true prayer and by saints, as we ought without the shadow of a doubt to believe, who can be found so obstinate and impudent, so puffed up with the pride of the devil's own rage, as to maintain that he is without sin, and not only to think himself greater than apostles, but also to charge the Saviour Himself with ignorance or folly, as if He either did not know that some men could be free from debts, or was idly teaching those whom He knew to stand in no need of the remedy of that prayer? But since all the saints who altogether keep the commands of their King, say every day
Forgive us our debts,if they speak the truth there is indeed no one free from sin, but if they speak falsely, it is equally true that they are not free from the sin of falsehood. Wherefore also that most wise Ecclesiastes reviewing in his mind all the actions and purposes of men declares without any exception:
that there is not a righteous man upon earth, that does good and sins not,Ecclesiastes 7:21 i.e., no one ever could or ever will be found on this earth so holy, so diligent, so earnest as to be able continually to cling to that true and unique good, and not day after day to feel that he is drawn aside from it and fails. But still though he maintains that he cannot be free from wrong doing, yet none the less we must not deny that he is righteous.
Chapter 19How even in the hour of prayer it is almost impossible to avoid sin.
Whoever then ascribes sinlessness to human nature must fight against no idle words but the witness and proof of his conscience which is on our side, and then only should maintain that he is without sin, when he finds that he is not torn away from this highest good: nay rather, whoever considering his own conscience, to say no more, finds that he has celebrated even one single service without the distraction of a single word or deed or thought, may say that he is without sin. Further because we admit that the discursive lightness of the human mind cannot get rid of these idle and empty things, we thus consequently confess with truth that we are not without sin. For with whatever care a man tries to keep his heart, he can never, owing to the resistance of the nature of the flesh, keep it according to the desire of his spirit. For however far the human mind may have advanced and progressed towards a finer purity of contemplation, so much the more will it see itself to be unclean, as it were in the mirror of its purity, because while the soul raises itself for a loftier vision and as it looks forth yearns for greater things than it performs, it is sure always to despise as inferior and worthless the things in which it is mixed up. Since a keener sight notices more; and a blameless life produces greater sorrow when found fault with; and amendment of life, and earnest striving after goodness multiplies groans and sighs. For no one can rest content with that stage to which he has advanced, and however much a man may be purified in mind, so much the more does he see himself to be foul, and find grounds for humiliation rather than for pride, and, however swiftly he may climb to greater heights, so much more does he see above him whither he is tending. Finally that chosen Apostle
whom Jesus loved,John 13:23 who lay on His bosom, uttered this saying as if from the heart of the Lord: 1 John 1:8 And so if when we say that we have no sin, we have not the truth, that is Christ, in us, what good do we do except to prove ourselves by this very profession, criminals and wicked among sinners?