Dear Mahina:

I praise God that you are coming into the Catholic Church, the Church that Jesus personally founded.

A couple of things to remember when studying any topic of the faith:

1) The Bible is only one source of authoritative doctrine and teaching. The "Word of God" is revealed by God through Sacred Tradition (Oral and Written). This means that not all of the teaching of Christ and his apostles is found in the Bible. The Bible itself says that in John 21:25. In addition 1 Cor 11:2 and  2 Thess 2:15 refer to holding fast to Tradition. 2 Thess 3:14 even says to shun people acting not according to Tradition.

Thus, to understand the full Word of God we look to the Bible and to the Magisterium of the Church who has been given the authority (Matt 28:18-20; John  20:23; Matt 16:18-19, 1 Cor 11:24; Luke 10:16; Matt 18:17-18) to teach with the voice of Christ, legislate, discipline, to offer sacrifice, and to exercise all power). Indeed it is the CHURCH, not the Bible that is the pillar and foundation of Truth (1 Tim 3:15).

Therefore, the question, "where is that is the Bible?" is an incomplete query since not all of the teaching of the faith is in the Bible.

With that said, however, all of Catholic doctrine is either found in the Bible directly or is derived from principles that can be found in the Bible.

2) The Bible is a religious document, not a book of science, history, philosophy, psychology, geography, or sex education. Rather, in the Bible we find the principles with which the Church can teach details that relate to those things.

As parents, we cannot instruct our children on every single subject and every single situation. We must teach our children how to think, teach them the principles of our faith, teach them the principles of Godly living. Then, when our kids come against a notion or situation without us parents being around, they can come to correct conclusions about the new situation based upon the fundamental and principles they have previously learned from us.

The Church does the same with its children. She cannot possible issue a document on every possible subject, or on every nuance of a subject. She teaches us the theological principles by which we apply to the details of subject or to subject that the Church has not specifically written about in order to find the answer.

In doing this we need to look for guidance to those who have thorough knowledge of those principles and theology to discern answers.

This point two is especially relevant concerning much of the advice I have given about sexuality. The foundation of what I have given is found in direct Church teaching, such as the Catechism. The details, however, often been derived from a logical and theological deduction of the explicit Church teaching.

As to the explicit Church teaching, such as the Catechism, the Church bases its teaching upon Sacred Scripture and Sacred Tradition.

For example, the Church teaches that abortion is a grave evil and sin. The Bible does not explicitly mention abortion, but it does mention "thou shall not kill", the Bible mentions the dignity of every human person and that life is precious. From these and other teachings of the Bible, and from the continuing teaching of the Church since AD 33, the Church affirms the value of all human life from the moment of conception to natural death.

But addressing your question directly the Catechism has many footnotes. Many of these footnotes are references to the Scripture verses that pertain to the subject being discussed. The footnotes also refer to various Church documents which in themselves will often have references to Scripture passages.

Look at the Catechism for the footnotes to the paragraphs I have quoted in my various answers. All of my answers come either from explicit Church teaching (and the Bible) or, in the case where there is no explicit teaching, from principles derived from Church teaching and the Bible.

In addition I recommend two websites that specialize in making the connection of the Bible to Church teaching:

Scripture Catholic
Biblical Evidence for Catholicism

Also, Catholic Answers has many pamphlets to explain various questions people have about the Catholic Faith. Look for the blue menu on the left of their page. There is a list of topics under "Library".

God Bless,
Bro. Ignatius Mary