"All generous minds have a horror of what are commonly called "Facts". They are the brute beasts of the intellectual domain"

Thomas Hobbes is suggesting that those with generous minds have a contempt for truths. He is indicating that facts are not to be relied on, as they are the "brute beasts" of the intellectual domain. He is recommending that truths are not trusted, and that they need to not be taken at face value. He is suggesting that truths can be manipulated and utilized to support any argument, no matter its validity. He is recommending that facts need to be seen with suspicion, and that generous minds ought to count on their own judgement and intuition when making choices. He is implying that facts must not be taken as the sole source of fact, which generous minds should look beyond them to acquire a better understanding of the world. He is suggesting that truths must be utilized as a tool to support one's own judgement, instead of as the sole source of reality.