"Standing on the Shoulders of Giants" — a Pleasantry With a Hidden Edge
In a letter to Hooke, Newton wrote the famous line "if I have seen further, it is by standing on the shoulders of giants," on the surface a modest pleasantry, but later scholars broadly hold it was actually a pun with a hidden sneer — Hooke was short and had a curved spine, and Newton’s line was very likely a barbed jab at the short Hooke through the word "giant," a glimpse of the personal grudge between the two.
The Priority Dispute Over Calculus
Newton and the German mathematician Gottfried Leibniz each independently developed calculus at almost the same time, and the two camps thereafter erupted in a fierce dispute lasting decades and reaching across the whole of European mathematics over "who was really the inventor," Newton even using his power in the Royal Society to lead a nominally "neutral" but plainly self-favoring investigation report; this long priority dispute for a time left British and continental mathematics long lacking exchange, objectively holding back British mathematics for a period.