John Wyclif (or Wycliffe) (1328 – December 31, 1384) was an English theologian and early proponent of reform in the Roman Catholic Church during the 14th century. He initiated the first English translation of the Bible in one complete edition and is considered a precursor of the Protestant Reformation. Wyclif was born at Ipreswell (modern Hipswell), Yorkshire, England, between 1320 and 1330; died at Lutterworth (near Leicester) December 31, 1384.
Wyclif's first encounter with the official Church of his time was prompted by his zeal in the interests of the State. His first tracts and greater works of ecclesiastical-political content defended the privileges of the State, and from these sources developed a strife out of which the next phases could hardly be determined. One who studies these books in the order of their production with reference to their inner content finds a direct development with a strong reformatory tendency. This was not originally doctrinal; when it later took up matters of dogma, as in the teaching concerning transubstantiation, the purpose was the return to original simplicity in the government of the Church. But it would have been against the diplomatic practice of the time to have sent to the peace congress at Bruges, in which the Curia had an essential part, a participant who had become known at home by his allegedly heretical teaching.
Wyclif earned his great repute as a philosopher at an early date. Henry Knighton says that in philosophy he was second to none, and in scholastic discipline incomparable. If this pronouncement seems hardly justified, now that Wyclif's writings are in print, it must be borne in mind that not all his philosophical works are extant. If Wyclif was in philosophy the superior of his contemporaries and had no equal in scholastic discipline, he belongs with the series of great scholastic philosophers and theologians in which England in the Middle Ages was so rich – with Alexander of Hales, Roger Bacon, Duns Scotus, Occam and Bradwardine. There was a period in his life when he devoted himself exclusively to scholastic philosophy: "when I was still a logician," he used later to say. The first "heresy" which "he cast forth into the world" rests as much upon philosophical as upon theological grounds.
Since it was from dealing with ecclesiastical-political questions that Wyclif turned to reformatory activities, the former have a large part in his reformatory writings. While he took his start in affairs of church policy from the English legislation which was passed in the times of Edward I, he declined the connection into which his contemporaries brought it under the lead of Occam. Indeed, he distinctly disavows taking his conclusions from Occam, and avers that he draws them from Scripture, and that they were supported by the Doctors of the Church. So that dependence upon earlier schismatic parties in the Church, which he never mentions in his writings (as though he had never derived anything from them), is counterindicated, and attention is directed to the true sources in Scripture, to which he added the collections of canons of the Church. Wyclif would have had nothing to gain by professing indebtedness to "heretical" parties or to opponents of the papacy. His reference to Scripture and orthodox Fathers as authorities is what might have been expected. So far as his polemics accord with those of earlier antagonists of the papacy, it is fair to assume that he was not ignorant of them and was influenced by them. The Bible alone was authoritative and, according to his own conviction and that of his disciples, was fully sufficient for the government of this world (De sufficientia legis Christi). Out of it he drew his comprehensive statements in support of his reformatory views--after intense study and many spiritual conflicts. He tells that as a beginner he was desperate to comprehend the passages dealing with the activities of the divine Word, until by the grace of God he was able to gather the right sense of Scripture, which he then understood. But that was not a light task. Without knowledge of the Bible there can be no peace in the life of the Church or of society, and outside of it there is no real and abiding good; it is the one authority for the faith.
These teachings Wyclif promulgated in his great work on the truth of Scripture, and in other greater and lesser writings. For him the Bible was the fundamental source of Christianity which is binding on all men. From this one can easily see how the next step came about: the furnishing of the Bible to the people in their mother tongue. Wyclif was called "Doctor evangelicus" by his English and Bohemian followers. Of all the reformers who preceded Martin Luther, Wyclif put most emphasis on Scripture: "Even though there were a hundred popes and though every mendicant monk were a cardinal, they would be entitled to confidence only in so far as they accorded with the Bible." Therefore in this early period it was Wyclif who recognized and formulated the formal principle of the Reformation-- the unique authority of the Bible for the belief and life of the Christian.