On Jan. 28, the Roman Catholic Church celebrates Saint Thomas Aquinas, the 13th century theologian who showed that the Catholic faith is in harmony with philosophy and all other branches of knowledge. Blessed John Paul II, in his 1998 letter “Fides et Ratio,” said St. Thomas “had the great merit …

An important figure in the Catholic counter-reformation that responded to the 16th century spread of Protestantism, the priest and Doctor of the Church Saint Peter Canisius is remembered liturgically on Dec. 21. His efforts as a preacher, author, and religious educator strengthened the Catholic faith in Germany, Austria, Switzerland, and …