A tip for researchers 

This article emphasizes the importance of cultivating an interest for a particular discipline. Sharing a highlight below.

Real wisdom is not the knowledge of everything, but the knowledge of which things in life are necessary, which are less necessary, and which are completely unnecessary to know.
One cannot observe everything closely, therefore one must discriminate and try to select the significant. When practicing a branch of science, the ‘trained’ observer deliberately looks for specific things which his training has taught him are significant, but in research he often has to rely on his own discrimination, guided only by his general scientific knowledge, judgment and perhaps an hypothesis which he entertains.
Well developed habits of observation are more important in research than large accumulations of academic learning. Effective scientific observation also requires a good background, for only by being familiar with the usual can we notice something as being unusual or unexplained. Chance favors the connected mind.