Today we have a venerable Lenten Mass. This Mass is best understood by remembering that the ancient catechumens (or prospective converts) used to come for instructions to the first part of Lenten Masses. The catechumens heard the readings and homily, and then left the church. The offertory procession and remainder of the Mass were for the faithful. This Wednesday was the first “scrutiny,” or test, for the catechumens. That test was on the Commandments of God. Both readings, consequently, are about the Commandments. –The Vatican II Weekday Missal
