The fear of the Lord dwelt in the heart of Luther, enabling him to maintain his steadfastness of purpose, and leading him to deep humility before God. He had an abiding sense of his dependence upon divine aid, and he did not fail to begin each day with prayer, while his heart was continually breathing a petition for guidance and support. “To pray well,” he often said, “is the better half of study.”(159) While one day examining the books in the library of the university, Luther discovered a Latin Bible. Such a book he had never before seen. He was ignorant even of its existence. He had heard portions of the Gospels and Epistles, which were read to the people at public worship, and he supposed that these were the entire Bible. Now, for the first time, he looked upon the whole of God’s word. With mingled awe and wonder he turned the sacred pages; with quickened pulse and throbbing heart he read for himself the words of life, pausing now and then to exclaim, “O that God would give me such a book for myself!”(160) Angels of heaven were by his side, and rays of light from the throne of God revealed the treasures of truth to his understanding. He had ever feared to offend God, but now the deep conviction of his condition as a sinner took hold upon him as never before. An earnest desire to be free from sin and to find peace with God, led him at last to enter a cloister, and devote himself to a monastic life. Here he was required to perform the lowest drudgery, and to beg from house to house. He was at an age when respect and appreciation are most eagerly craved, and these menial offices were deeply mortifying to his natural feelings; but he patiently endured this humiliation, believing that it was necessary because of his sins.