Martin Luther, was a German professor of theology, composer, priest, monk, and a seminal figure in the Protestant Reformation.
Saint Augustine of Hippo was a Roman African, early Christian theologian and philosopher from Numidia whose writings influenced the development of Western Christianity and Western philosophy. He was the bishop of Hippo Regius in north Africa and is viewed as one of the most important Church Fathers in Western Christianity for his writings in the Patristic Era. Among his most important works are The City of God, On Christian Doctrine and Confessions.
The pope, also known as the supreme pontiff, is the Bishop of Rome and therefore ex officio the leader of the worldwide Catholic Church. The primacy of the Roman bishop is largely derived from his role as the apostolic successor to Saint Peter, to whom Jesus is said to have given the Keys of Heaven and the powers of "binding and loosing", naming him as the "rock" upon which the church would be built. Since the 1860s, the pope has also been head of state of Vatican City, a city-state entirely enclaved within Rome, Italy. The current pope is Francis, who was elected on 13 March 2013, succeeding Benedict XVI.
Saint Thomas Aquinas was an Italian Dominican friar, Catholic priest, and Doctor of the Church. He was an immensely influential philosopher, theologian, and jurist in the tradition of scholasticism, within which he is also known as the Doctor Angelicus and the Doctor Communis. The name Aquinas identifies his ancestral origins in the county of Aquino in present-day Lazio.
Søren Aabye Kierkegaard was a Danish philosopher, theologian, poet, social critic and religious author who is widely considered to be the first existentialist philosopher. He wrote critical texts on organized religion, Christendom, morality, ethics, psychology, and the philosophy of religion, displaying a fondness for metaphor, irony and parables. Much of his philosophical work deals with the issues of how one lives as a "single individual", giving priority to concrete human reality over abstract thinking and highlighting the importance of personal choice and commitment. He was against literary critics who defined idealist intellectuals and philosophers of his time, and thought that Swedenborg, Hegel, Goethe, Fichte, Schelling, Schlegel and Hans Christian Andersen were all "understood" far too quickly by "scholars".
Sir Isaac Newton was an English mathematician, astronomer, theologian, author and physicist who is widely recognised as one of the most influential scientists of all time, and a key figure in the scientific revolution. His book Philosophiæ Naturalis Principia Mathematica, first published in 1687, laid the foundations of classical mechanics. Newton also made pathbreaking contributions to optics, and shares credit with Gottfried Wilhelm Leibniz for developing the infinitesimal calculus.
In Christian theology and ecclesiology, the apostles, particularly the Twelve Apostles, were the primary disciples of Jesus, the central figure in Christianity. During the life and ministry of Jesus in the 1st century AD, the apostles were his closest followers and became the primary teachers of the gospel message of Jesus. The word disciple is sometimes used interchangeably with apostle; for instance, the Gospel of John makes no distinction between the two terms.
John Calvin was a French theologian, pastor and reformer in Geneva during the Protestant Reformation. He was a principal figure in the development of the system of Christian theology later called Calvinism, aspects of which include the doctrines of predestination and of the absolute sovereignty of God in salvation of the human soul from death and eternal damnation, in which doctrines Calvin was influenced by and elaborated upon the Augustinian and other Christian traditions. Various Congregational, Reformed and Presbyterian churches, which look to Calvin as the chief expositor of their beliefs, have spread throughout the world.
Saint Teresa of Ávila, also called Saint Teresa of Jesus, baptized as Teresa Sánchez de Cepeda y Ahumada, was a prominent Spanish mystic, Roman Catholic saint, Carmelite nun, author, and theologian of contemplative life through mental prayer. Active during the Counter-Reformation, she was a reformer in the Carmelite Order of her time; the movement she initiated, later joined by Saint John of the Cross, eventually led to the establishment of the Discalced Carmelites, though neither she nor John were alive when the two orders separated.
Dietrich Bonhoeffer was a German pastor, theologian, anti-Nazi dissident, and key founding member of the Confessing Church. His writings on Christianity's role in the secular world have become widely influential, and his book The Cost of Discipleship has become a modern classic.
Saint Anthony of Padua, born Fernando Martins de Bulhões, also known as Anthony of Lisbon, was a Portuguese Catholic priest and friar of the Franciscan Order. He was born and raised by a wealthy family in Lisbon, Portugal, and died in Padua, Italy. Noted by his contemporaries for his powerful preaching, expert knowledge of scripture, and undying love and devotion to the poor and the sick, he was one of the most quickly canonized saints in church history. He was proclaimed a Doctor of the Church on 16 January 1946. He is also the patron saint of lost things.
Samuel Taylor Coleridge was an English poet, literary critic, philosopher and theologian who, with his friend William Wordsworth, was a founder of the Romantic Movement in England and a member of the Lake Poets. He wrote the poems The Rime of the Ancient Mariner and "Kubla Khan", as well as the major prose work Biographia Literaria. His critical work, especially on William Shakespeare, was highly influential, and he helped introduce German idealist philosophy to English-speaking culture. Coleridge coined many familiar words and phrases, including suspension of disbelief. He had a major influence on Ralph Waldo Emerson and on American transcendentalism.
Clive Staples Lewis was a British novelist, poet, academic, medievalist, philosopher, literary critic, essayist, lay theologian, broadcaster, lecturer, and Christian apologist. He held academic positions at both Oxford University and Cambridge University. He is best known for his works of fiction, especially The Screwtape Letters, The Chronicles of Narnia, and The Space Trilogy, and for his non-fiction Christian apologetics, such as Mere Christianity, Miracles, and The Problem of Pain.