Answer:
he was gay because he killed alot of Jews...
The word "felicity" here means a sense of satisfaction, almost catharsis, as the speaker has found closure in his prayer and happiness.
Greek and Latin matter because it helps us with the pronunciation of words and the origin of words. When we know about where these words come from, how they are broken down (with suffixes and prefixes), and how each are pronounced, you better understand not only the word, but the meaning and the logic behind the word. This also aids in reading comprehension. Greek and Latin is key to understanding vocabulary, and a good vocabulary helps you to understand what you are reading.
This story is found in 1 Samuel 1
let's start from the beginning.
A war has broken out between the Philistines and the Israelites. Saul, with the Israelites, is the "commander" for them. A giant named Goliath, from the Philistines, came and started taunting them. All the Israelites including Saul were terrified.
Flash sideways to Jesse, the father of David and three of the men at the camp. He sent David to bring his brothers some bread and cheese and ask how they are. When he gets there he over hears Goliath smack-talking them and God. This angers David and he wants to fight him saying; "When a lion or a bear came and carried off a sheep from the flock, I went after it, struck it and rescued the sheep from its mouth. When it turned on me, I seized it by its hair, struck it and killed it."
