"I remember, when I have preached at different times in the country, and sometimes here, that my whole soul has agonized over men, every nerve of my body has been strained and I could have wept my very being out of my eyes and carried my whole frame away in a flood of tears, if I could but win souls"

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It is probably true quite generally that in the history of human thinking the most fruitful developments frequently take place at those points where two different lines of thought meet. These lines may have their roots in quite different parts of human nature, in different times or different cultural environments or different religious traditions: hence if they actually meet, that is, if they are at least so much related to each other that a real interaction can take place, then one may hope that new and interesting developments may follow.

— Werner Heisenberg