From the Second Vatican Council's Decree on the Apostolate of Lay People: "Wherever men are to be found who are in want of food and drink, of clothing, housing, medicine, work, education, the means necessary for leading a truly human life, wherever there are men racked by misfortune or illness, men suffering exile or imprisonment, Christian charity should go in search of them and find them out, comfort them with devoted care and give them the helps that will relieve their needs. This obligation binds first and foremost the more affluent individuals and nations."
This is what I believe. I've rarely seen it presented so concisely and thoroughly. This paragraph leads DIRECTLY to my beliefs on universal healthcare, education of my fellow man (including education of those in prison), the treatment of veterans and refugees, and the taxes to be paid by the wealthy.