Why do Catholics emphasize the unity of their Church over the existence of many Protestant denominations?

In what ways can understanding the concept of overcoming in Scripture provide comfort to someone facing tribulations?
How do you handle a situation where you and your partner love each other deeply, but desire entirely opposite lifestyles?
What makes the elephant such a formidable opponent that even the largest predators can't take it down easily?
How does God's "jealousy" in James 4:5 compare with human jealousy mentioned earlier in James? Why is God's jealousy considered righteous?
Why can casual conversations be so confusing for people on the autism spectrum, and what can neurotypicals do to help make interactions smoother?
Can a marriage survive after one partner loses trust in the other?
Why do you think people have a hard time believing that Jimmy Kimmel and Jimmy Fallon genuinely like each other?
How can I tell the difference between a comforting dream of my son and a real message from him in my sleep?
Will the "grey market" of offshore casinos eventually disappear as more Canadian provinces move toward the Ontario-style regulated model?