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. Whosoever - shall break one of these least commandments - The Pharisees were remarkable for making a distinction between weightier and lighter matters in the law, and between what has been called, in a corrupt part of the Christian Church, mortal and venial sins. See on Matthew 22:36 (note).
Whosoever shall break. What an awful consideration is this! He who, by his mode of acting, speaking, or explaining the words of God, sets the holy precept aside, or explains away its force and meaning, shall be called least - shall have no place in the kingdom of Christ here, nor in the kingdom of glory above. That this is the meaning of these words is evident enough from the following verse.