1.) Authority — Only Christ has the authority
2.) History — The proof is here; a lot of people don’t want to accept it.
3.) The Catholic Church gave Christians the Bible— another thing some people don’t want to accept.
4.) The Sacraments are Biblical — everything from Reconciliation/Confession to Eucharist to Anointing of the Sick. Where did Christ work his first miracle? At a wedding, thus giving it sacramental status.
5.) Sola Scriptura is not supported in the Bible — WooHoo!
Educate yourself further in Post 24