“White blood cells and other cells of ours actively seek out and kill foreign microbes. The specific antibodies that we gradually build up against a particular microbe infecting us make us less likely to get reinfected once we become cured. As we all know from experience, there are some illnesses, such as flu and the common cold, to which our resistance is only temporary; we can eventually contract the illness again. Against other illnesses, though—including measles, mumps, rubella, pertussis, and the now defeated smallpox — our antibodies stimulated by one infection confer lifelong immunity. That's the principle of vaccination: to stimulate our antibody production without our having to go through the actual experience of the disease, by inoculating us with a dead or weakened strain of microbe.”

The Fourth Presidential Paper — Foreign Affairs : Letter To Castro
The Presidential Papers (1963)

"Wilfred Owen's Juvenilia" (p. 26)
The Strength of Poetry: Oxford Lectures (2001)

Source: Julian and Maddalo http://www.bartleby.com/139/shel115.html (1819), l. 170

Notre repentir n'est pas tant un regret du mal que nous avons fait, qu'une crainte de celui qui nous en peut arriver.
Maxim 180.
Reflections; or Sentences and Moral Maxims (1665–1678)

Henry Mintzberg (1989) Mintzberg on management: inside our strange world of organizations. p. 301. As cited in: R. van den Nieuwenhof (2003) 2 strategie: omgaan met de omgeving. p. 36

XIV. In what sense, though the Gods never change, they are said to be made angry and appeased.
On the Gods and the Cosmos
Context: If any one thinks the doctrine of the unchangeableness of the Gods is reasonable and true, and then wonders how it is that they rejoice in the good and reject the bad, are angry with sinners and become propitious when appeased, the answer is as follows: God does not rejoice — for that which rejoices also grieves; nor is he angered — for to be angered is a passion; nor is he appeased by gifts — if he were, he would be conquered by pleasure.
It is impious to suppose that the divine is affected for good or ill by human things. The Gods are always good and always do good and never harm, being always in the same state and like themselves. The truth simply is that, when we are good, we are joined to the Gods by our likeness to live according to virtue we cling to the Gods, and when we become evil we make the Gods our enemies — not because they are angered against us, but because our sins prevent the light of the Gods from shining upon us, and put us in communion with spirits of punishment. And if by prayers and sacrifices we find forgiveness of sins, we do not appease or change the Gods, but by what we do and by our turning toward the divine we heal our own badness and so enjoy again the goodness of the Gods. To say that God turns away from the evil is like saying that the sun hides himself from the blind.

The Unclassed (1884), ch. 1: School

Source: The Jungles of Randomness: A Mathematical Safari (1997), Chapter 10, “Lifetimes of Chance” (p. 202)

Source: Essential Ohsawa - From Food to Health, Happiness to Freedom - Understanding the Basics of Macrobiotics (1994), p. 82