Following the death of King Joao of Portugal in 1494, his son King Manuel I ascended the throne. When his legitimacy as heir to the throne was challenged, Manuel wished to marry Princess Isabel of Spain, daughter of Ferdinand and Isabella, in order to solidify his position. As a precondition to the marriage, the Spanish monarch demanded that Portugal expel its Jews—many of whom were refugees from the 1492 Spanish Expulsion who found refuge in the neighboring country of Portugal. Manuel agreed, and five days after the marriage agreement was signed, on Tevet 23 (5257), he issued a decree giving Portugal's Jews eleven months to leave the country.
Appreciating the Jews' economic value, Manuel was unhappy with the potential loss of this economic asset, and devised a way to have the Jews stay in Portugal—but as Christians. Initially, he instructed the Jews to leave from one of three ports, but soon he restricted them to leaving from Lisbon only. When October of 1497 arrived, thousands of Jews assembled there and were forcibly baptized. Many Jews stayed and kept their Jewish faith secret; they were called Marranos or Crypto-Jews.
Over the next 350 years, the infamous Inquisition persecuted, tortured and burned at the stake thousands of hidden Jews throughout Spain, Portugal and their colonies for continuing to secretly practice the Jewish faith.
Links: The End of Spanish Jewry
Samuel Nunez-Ribeiro—The Life of a Secret Jew
Why is Torah compared to light? Because it tells us the place of each thing.
Because, in truth, there is no need to change the world. Everything is here.
Each thing has a place, and in that place it is good. Altogether, it is very good, a beautiful world. All that’s needed is a little light.
What is light? Light doesn't add anything or take away. It only reveals the meaning and purpose of all that it shines upon.
Think of your own home. In the dark, there is no way to know what belongs in your closet and what belongs in the laundry, what is ready for use and what is in need of repair. Instead, that which could be washed or repaired is rejected and despised, and your most valuable possessions may become the greatest hazards.
Switch on one little light and a dangerous place becomes a home. With every light you add, you become suddenly wealthier and more blessed.
So too, this world is meant to be G-d’s home. Torah is light. Shine it bright and heal the world.