Just two days ago I decided to read one of Feynman's papers (the one on the Hellman-Feynman theorem). His style is amazingly readable and almost conversational,

Just two days ago I decided to read one of Feynman's papers (the one on the Hellman-Feynman theorem). His style is amazingly readable and almost conversational, even in dense scientific work, and yet it's still sufficiently precise and formal to seem perfectly in place in a journal. I've been trying ever since to figure out how he does it.