To understand the true quality of people, you must look into their minds, and examine their pursuits and aversions.
Social movements are at once the symptoms and the instruments of progress. Ignore them and statesmanship is irrelevant; fail to use them and it is weak.
He was a sociologist; he had got into an intellectual muddle early on in life and never managed to get out.
No sociologist should think himself too good, even in his old age, to make tens of thousands of quite trivial computations in his head and perhaps for months at a time. One cannot with impunity try to transfer this task entirely to mechanical assistants if one wishes to figure something, even though the final result is often small indeed.