It may be observed that there is another meaning again in which the term `Caution' is sometimes used. Since of the various means which we may use to gain any end, some are more and some less certain; and some are dangerous at is, involve a chance of consequences either antagonistic to our pursuit, or on different grounds to be avoided---while others are free from such danger; `Caution' is often used to denote the temper of mind which inclines to the more certain and less dangerous means. In this sense, in so far as the chance in each case of winning the end, and the value of the end as compared with other ends, and as weighed against the detriment which its pursuit may entail, can be precisely estimated, the limits of the duty of Caution may obviously be determined without difficulty.

ME Book 3 Chapter 3 Section 3