First Reading: Exodus 19:1-2,9-11,16-20b
1 In the third month of the departure of Israel out of the land of Egypt, on this day they came into the wilderness of Sinai:
2 For departing out of Raphidim, and coming to the desert of Sinai, they camped in the same place, and there Israel pitched their tents over against the mountain.
9 The Lord said to him: Lo, now will I come to thee in the darkness of a cloud, that the people may hear me speaking to thee, and may believe thee for ever. And Moses told the words of the people to the Lord.
10 And he said to him: Go to the people, and sanctify them today, and tomorrow, and let them wash their garments.
11 And let them be ready against the third day: for on the third day the Lord will come down in the sight of all the people upon mount Sinai.
16 And now the third day was come, and the morning appeared: and behold thunders began to be heard, and lightning to flash, and a very thick cloud to cover the mount, and the noise of the trumpet sounded exceeding loud, and the people that was in the camp, feared.
17 And when Moses had brought them forth to meet God from the place of the camp, they stood at the bottom of the mount.
18 And all mount Sinai was on a smoke: because the Lord was come down upon it in fire, and the smoke arose from it as out of a furnace: and all the mount was terrible.
19 And the sound of the trumpet grew by degrees louder and louder, and was drawn out to a greater length: Moses spoke, and God answered him.
20 And when he was gone up thither.
Psalm: Daniel 3:52-56
52 Blessed art thou, O Lord the God of our fathers: and worthy to be praised, and glorified, and exalted above all for ever: and blessed is the holy name of thy glory: and worthy to be praised, and exalted above all in all ages.
53 Blessed art thou in the holy temple of thy glory: and exceedingly to be praised, and exceeding glorious for ever.
54 Blessed art thou on the throne of thy kingdom, and exceedingly to be praised, and exalted above all for ever.
55 Blessed art thou, that beholdest the depths, and sittest upon the cherubims: and worthy to be praised and exalted above all for ever.
56 Blessed art thou in the firmament of heaven: and worthy of praise, and glorious for ever.
Gospel: Matthew 13:10-17
10 And his disciples came and said to him: Why speakest thou to them in parables?
11 Who answered and said to them: Because to you it is given to know the mysteries of the kingdom of heaven: but to them it is not given.
12 For he that hath, to him shall be given, and he shall abound: but he that hath not, from him shall be taken away that also which he hath.
13 Therefore do I speak to them in parables: because seeing they see not, and hearing they hear not, neither do they understand.
14 And the prophecy of Isaias is fulfilled in them, who saith: By hearing you shall hear, and shall not understand: and seeing you shall see, and shall not perceive.
15 For the heart of this people is grown gross, and with their ears they have been dull of hearing, and their eyes they have shut: lest at any time they should see with their eyes, and hear with their ears, and understand with their heart, and be converted, and I should heal them.
16 But blessed are your eyes, because they see, and your ears, because they hear.
17 For, amen, I say to you, many prophets and just men have desired to see the things that you see, and have not seen them, and to hear the things that you hear and have not heard them.