Simple answer it is in the Catechism yes But you still have to make sure you are interpreting it right. Because that is how the whole Protestant Reformation started is with people interpreting the Bible to there own desires and wishes.
Example Abortion and Slavery have been justified with the Bible but Catholic church teaching has never justified either
1 Magisterium
2 Tradition (capital T)
3 Scripture
4 Holy Spirit personal revelation
If something has been declare true in the Magisterium it can not be challenge it is done The interpretation may be challenged Not everything is here though
Tradition capital T this is what the church has believe the last 2000 years Now here you have to separate dogma and discipline
Dogma men can only be priest this can never change
discipline married priest this can change
Scripture can be interpreted base within the confines Magisterium and Tradition
Person Revelation Catholic can choose to believe or not to believe unless the church has condemn them But sometimes the condemnation is reversed usually because language or misquotes
Catholic teaching and Apologetic does not lend it self well to one line statement as you can see with my response. Even this response is very light and I could fill a whole book if I wanted
Can you speak up Sure could you be wrong Sure could I be wrong yes but the idea is to have a discussion trying not to get angry and grow in spirituality. Nothing is more decisive that peoples religious beliefs
Thanks.