More on problems ...

“big” problems may lead to big rewards but may also lead to big disasters
inspiration and creativity is important but scientific work is to 99% “sweat”
scientific value does not always lie in “originality”
“scientific revolutions” are often the result of persistent work on topics that to an external observer may look like details
“universal theories” will come out, if at all, as answers to partial theories to modest problems formulated by clear-cut and restricted questions [Bunge, 1967]