Remigius of Auxerre
Catena Aurea · Matthäusevangelium 5
Think not that I am come to destroy the Law, or the Prophets: I am not come to destroy, but to fulfil. For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled. Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven.
Amen is a Hebrew word, and may be rendered in Latin, ‘vere,’ ‘fidenter,’ or ‘fiat;’ that is, ‘truly,’ ‘faithfully,’ or ‘so be it.’ The Lord uses it either because of the hardness of heart of those who were slow to believe, or to attract more particularly the attention of those that did believe.