Scientist Quotes and aphorisms about difficult Marie Curie ,, All my mind was centered on my studies, which, especially at the beginning, were difficult. In fact... Aaron Ciechanover Ada Yonath Barry Marshall Edmond Halley Dan Farmer M. S. Swaminathan Pardis Sabeti ,, It's just difficult to see that people want to be like the actors and the performers and the politi... Pardis Sabeti ,, I don't really love to perform in music. Some people like it more, but it's not my thing so much, b... Vaclav Smil