People that are at work on different things do not care a great deal for each other's specialties, and people that work on the same thing are always afraid lest one should get ahead of the other, or steal some of his ideas before he has made them public.
 Oliver Wendell Holmes Sr., The Poet at the Breakfast-Table (1872). copy citation

Context

“I get a box of insects now and then, and send a few beetles to coleopterists in other entomological districts; but science is exacting, and a man that wants to leave his record has not much time for friendship. There is no great chance either for making friends among naturalists. People that are at work on different things do not care a great deal for each other's specialties, and people that work on the same thing are always afraid lest one should get ahead of the other, or steal some of his ideas before he has made them public. There are none too many people you can trust in your laboratory. I thought I had a friend once, but he watched me at work and stole the discovery of a new species from me, and, what is more, had it named after himself.” source