"Those who commit lewdness are in their hands." Rabbi Pinchas HaKohen Bar Chama said: These are people who play with dice, who calculate with their left hand and support themselves with their right, and they rob and steal from each other.
"To David: The Lord is my light and my salvation, whom shall I fear? This is what is written (Isaiah 10:17): "And the light of Israel will become a fire, and his Holy One a flame." In the custom of the world, people light a candle with their own matches. One might say that so-and-so who loves me will use my light, and so-and-so who hates me will not use my light. But everyone uses the light. However, the Holy One, blessed be He, is not like that. Rather, "And the light of Israel will become a fire, and his Holy One a flame." The righteous will see, and the wicked will not. This was already demonstrated in Egypt (Exodus 10:23): "But for all the children of Israel there was light." (ibid 13:21) "And the Lord went before them by day." And it is said (ibid 14:20) "And he gave light to them in the night." And it is said (Micah 7:8) "When I sit in darkness, the Lord will be a light unto me." Therefore it is said, "The Lord is my light and my salvation." (Psalms 27:1) And it is said (ibid 43:3) "Send forth your light and your truth." (And an example for the future is said) "God created the light which is hidden away for the righteous to use in the future." (Proverbs 13:9) "The light of the righteous rejoices." And it is said (Genesis 1:4) "And God saw the light, that it was good." Rabbi Yehuda, son of Rabbi Simon, said, "God separated the light for Himself, as it were." A parable: A king who saw a beautiful garment and said, "This is mine." Similarly, when God created the world, He said, "No creature can use it except for me." And thus it is said (Daniel 2:22) "And with Him is light." Rabbi Avin said, "God took it and wrapped Himself in it like a garment, and He brightened the world with its radiance." And this is what is written (Psalms 104:2) "He wraps Himself in light as with a garment." The Rabbis said, "He separated it for Himself in order to give it to the righteous in the future." A parable: A king who had a beautiful garment and said, "This is for my son." And thus it is said (Psalms 97:11) "Light is sown for the righteous." David said before the Lord, "Master of the Universe, when will the Messiah come?" He said to him, "When the end comes and Jerusalem is built, then I will bring him." "And upon you, the Lord will shine. And if you wonder about this matter, the Holy One, blessed be He, has already shown an example to Israel, as it is stated (Exodus 14:20), 'And there was a cloud and darkness.' If there was a cloud, why was there darkness? And if there was darkness, why was there a cloud? Rabbi Hoshaya said, 'There were two faces to the cloud; for Israel, it was light, and for Egypt, it was darkness.' David said, 'I sing about that light, as it is said, "The Lord is my light and my salvation" (Psalm 27:1).' This is why the verse says (Psalm 119:105), 'Your word is a lamp unto my feet.' Why are the wicked compared to darkness? It is like someone who walks in the dark of night and stumbles upon a stone and falls. Then he reaches a thorn and falls into it. As it is said (Proverbs 4:19), 'The way of the wicked is like darkness; they know not at what they stumble.' Why are the righteous compared to light? It is like someone who walks with a torch in his hand. When he reaches a stone, he guards himself so as not to stumble. When he reaches a thorn, he guards himself so as not to fall into it. Thus, David said, 'When I come to desecrate the Sabbath, the Torah enlightens me, as it is said (Deuteronomy 5:12), "Keep the Sabbath day holy." When I come to commit adultery, the Torah enlightens me, as it is said (Leviticus 20:10), "The adulterer and adulteress shall surely be put to death." This is what is meant by the verse (Psalm 119:105), 'Your word is a lamp unto my feet.' Another interpretation: If we say 'lamp,' why do we say 'light?' And if we say 'light,' why do we say 'lamp?' David said, 'When I begin to study the Torah, I start with a little, and they flow from me. And when I enter into it, many gates open up for me.' Therefore, it is said, 'Your word is a lamp unto my feet, and a light unto my path' (Psalm 119:105)."