Tosefta zu Mischlej 20:34

On the evening of the fourteenth, we check for chamets by candlelight, not by sunlight, not by moonlight, but rather only by candlelight (since the candlelight is greater). Even though there's no explicit proof for this, it's a remembrance for that which is discussed (Tzefaniah 1) "And in that time I will look through Jerusalem by candle" and that which it says (Proverbs 20) "The candle of God is a human soul".

The measure [allotted] to anyone that teaches a single chapter to his fellow, the verse ascribes to him as though he formed him, and shaped him, and brought him into this world, as it is said (Jer. 15:19), "If you bring out the precious (yakar) from what is worthless, you shall be as My spokesman (lit., 'My mouth')" (JPS Tr.). For just as the selfsame mouth [of God] imbued Adam the first man with a soul, so too [as to] anyone who brings a single creation under the wings of the shekhinah, we ascribe to him as though he formed him, and shaped him, and brought him into this world. And "precious" (yakarah) is Torah (lit., "teaching"), as it is said (Prov. 3:15), "She is more precious than rubies; [All of your goods cannot equal her]," and it says (Prov. 20:15), "Gold is plentiful, jewels abundant, But wise speech is a precious object" (JPS Tr.).