"Feeling in love (or lust) and fear feel a lot alike. They both give you that anxious butterfly feeling in your stomach, a sense of excitement, and a general unease physically and mentally. It's easy to confuse love with fear."

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In my work I now have the comfortable feeling that I am so to speak on my own ground and territory and almost certainly not competing in an anxious race and that I shall not suddenly read in the literature that someone else had done it all long ago. It is really at this point that the pleasure of research begins, when one is, so to speak, alone with nature and no longer worries about human opinions, views and demands. To put it in a way that is more learned than clear: the philological aspect drops out and only the philosophical remains.

— Heinrich Hertz