He was a diligent seeker after the truth, and was perfectly sincere when he informed a critic of the exact number of "truths" he had discovered, and when he remarked to one of his pupils a few days before his death, "Rest assured that what I have written in my book is the truth."
On the other hand, criticism has given a deeper meaning to the Old Testament history, and has brought into relief the central truths which really are vital; it may be said to have replaced a divine account of man by man's account of the divine.
His son Jean Antoine served with distinction through all the later campaigns of the reign of Louis XIV., and especially distinguished himself in 1705 at the battle of Cassano, where he was so severely wounded in the neck that he had ever after to wear a silver stock; yet he never rose above the rank of colonel, owing to an eccentric habit of speaking unpleasant truths to his superiors.
The truths which this "disposition of nature" obliges us to accept can be neither proved nor disproved; they are practically followed even by those who reject them speculatively.
But Buffier does not claim for these truths of "common sense" the absolute certainty which characterizes the knowledge we have of our own existence or the logical deductions we make from our thoughts; they possess merely the highest probability, and the man who rejects them is to be considered a fool, though he is not guilty of a contradiction.