What does the word felicity mean in this context?

Idon’t know the answers to these problems

It's to know your purpose before you read something because a purpose can:

4.in those days the church was not merely a thermometer that recorded the ideas and principles of popular opinion; it was a thermostat that transformed the mores of society. •type of figurative language: •meaning of figurative language: •effect on tone and mood: •effect on audience: choose out of these: hyperbole, irony, historical question, paradox, allusion,metaphor,personification,symbolism and simile