The benefit of knowledge is that it makes the world more predictable, but the cost is that a predictable world sometimes seems less delicious, less exciting, less poignant.
Timothy D. Wilson et al., The Pleasures of Uncertainty: Prolonging Positive Moods in Ways People Do Not Anticipate., Journal of Personality and Social Psychology, vol. 88, no. 1, 2005, pp. 5–21, p. 5