text: In the first question, St. Thomas addresses sacred scripture and whether it is science, wisdom, what is its subject, whether it is a matter of argument, etc.  You can read it yourself to figure out his answers:\n\nhttp://www.newadvent.org/summa/100100.htm\n\nIn Q. 12, St. Thomas addresses how God, an infinite being, may be known by us, finite creatures.  This is a difficult matter, and must be addressed article by article. \n\nhttp://www.newadvent.org/summa/101200.htm\n\nFinally, in the 13th question, St. Thomas deals with the names of God, that it, whether anything can properly be said of God.  \n\nhttp://www.newadvent.org/summa/101300.htm\n\nRegarding salvation, St. Thomas argues that man cannot attain happiness (a vision of God ala Q. 12) by his own action.  However, "rectitude of will" is necessary on the part of man for happiness.  http://www.newadvent.org/summa/200507.htm\n\nI'm not sure, however, of the 3 ways St. Thomas said that man can obtain salvation.