The congregation of the college of La Flèche had then the good fortune of being directed by Father Bagot, one of those superior priests always so numerous in the Company of Jesus. At one time confessor to King Louis XIII, Father Bagot was a profound philosopher and an eminent theologian. It was under his clever direction that the mind of François de Laval was formed, and we shall witness later the germination of the seed which the learned Jesuit sowed in the soul of his beloved scholar.
At this period great families devoted to God from early youth the younger members who showed inclination for the religious life. François was only nine years old when he received the tonsure, and fifteen when he was appointed canon of the cathedral of Evreux. Without the revenues which he drew from his prebend, he would not have been able to continue his literary studies; the death of his father, in fact, had left his family in a rather precarious condition of fortune. He was to remain to the end of his career the pupil of his preferred masters, for it was under them that, having at the age of nineteen left the institution where he had brilliantly completed his classical education, he studied philosophy and theology at the Collège de Clermont at Paris.
He was plunged in these noble studies, when two terrible blows fell upon him; he learned of the successive deaths of his two eldest brothers, who had fallen gloriously, one at Freiburg, the other at Nördlingen. He became thus the head of the family, and as if the temptations which this title offered him were not sufficient, bringing him as it did, together with a great name a brilliant future, his mother came, supported by the Bishop of Evreux, his cousin, to beg him to abandon the ecclesiastical career and to marry, in order to maintain the honour of his house. Many others would have succumbed, but what were temporal advantages to a man who had long aspired to the glory of going to preach the Divine Word in far-off missions? He remained inflexible; all that his mother could obtain from him was his consent to devote to her for some time his clear judgment and intellect in setting in order the affairs of his family. A few months sufficed for success in this task. In order to place an impassable abyss between himself and the world, he made a full and complete renunciation in favour of his brother Jean-Louis of his rights of primogeniture and all his titles to the seigniory of Montigny and Montbeaudry. The world is ever prone to admire a chivalrous action, and to look askance at deeds which appear to savour of fanaticism. To Laval this renunciation of worldly wealth and honour appeared in the simple light of duty. His Master's words were inspiration enough: "Wist ye not that I must be about my Father's business?"