From philosophy professor James Spiegel:
1. Augustine (5th century): Remember that you are a citizen of another kingdom.
2. Martin Luther (16th century): Expect politicians to be corrupt.
3. Thomas Aquinas (13th century): God has made himself known in nature.
4. John Calvin (16th century): God is sovereign over all, including our suffering.
5. Jonathan Edwards (18th century): God is beautiful, and all beauty is divine.
6. Thomas a’Kempis (15th century): Practice self-denial with a passion.
7. John Wesley (18th century): Be disciplined and make the best use of your time.
8. Fyodor Dostoevsky (19th century): God’s grace can reach anyone.
9. Dietrich Bonhoeffer (20th century): Beware of cheap grace.
10. Alvin Plantinga (21st century): Moral virtue is crucial for intellectual health.
Read the whole post for his explanation of each point.