To Mr X
… As for the unleavened bread about which you spoke to me, I confess that I am surprised that Christians can be concerned about it, as though what entered the body could defile or cleanse us. It is a proof that the soul has completely lost the leading of the Holy Spirit. There is not any direction in the Word to make us imitate Judaism in this respect, or to plunge us into sterile Judaism – and having begun in Spirit, to make us go on to be perfect in the flesh, for it is not so. But in this particular case, this idea is the more unhappy, because the Spirit of God has given an application expressly, the spiritual application of this figure: Christ our Passover has been sacrificed for us, this is why we celebrate the feast, not with the leaven of malice and wickedness, but with the unleavened bread of sincerity and truth. That is to say, in Christianity, this figure signifies sincerity and truth. As to the letter of the law, the unleavened bread is an ordinance of the law. The letter kills but the Spirit quickens. Those who seek to make themselves important will seek it in useless comparisons. For one who is led by the Spirit, this is impossible: to subject the whole meeting to the letter which kills to satisfy the mind of the one who is led astray is an intolerable thing. For every spiritual man, these words: “the letter kills” are enough to deliver him from such thoughts.
 1 Cor 5: 7, 8
 2 Cor 3: 6
Letter originally written in French, translated by Sosthenes, 2013
Click here for original – If you have any comments on the translation, feel free to let me know.