What by attendancies to those affairs, which the necessaries and conveniencies of Living do exact from him ; and what by adhering to those Studies, to which in his Youth he had accustom'd his mind, perhaps he may live to see himself baffleable by every fresh Adventurer , so as to bear the shame of being out-done in common Talk by any such an one, as is better acquainted with the newer methods, and later notions of his own Sciences. And this accounts for the first Reason.
Source: wiktionary