Read what the Early Church Fathers wrote: http://www.ccel.org/fathers.html
Tradition and the Church: https://www.tanbooks.com/index.php/page/shop:flypage/product_id/689/keywords/tradition+church/ (Great book, within the first couple of Chapters, you will have a good solid understanding of what Tradition is)
Read the Writings of the Saints, such as The Dolorous Passion of Our Lord Jesus Christ, The Mystical City of God (http://www.stjosephpublications.com/books_page.htm ), Autobiography of St. Teresa of Avila, &c.,
Oremus pro invicem