A theoretical system does not merely state facts which have been observed and that logically deducible relations to other facts which have also been observed. ↗
If philosophy is practice, a demand to know the manner in which its history is to be studied is entailed: a theoretical attitude toward it becomes real only in the living appropriation of its contents from the texts. ↗
Mental illness, of course, is not literally a 'thing' - or physical object - and hence it can 'exist' only in the same sort of way in which other theoretical concepts exist. ↗
This success led my theoretical group to the chemical reactivity theory, extending more and more widely the range of compound and reactions that were discussed. ↗
About 1960, it became clear that it was best for me to bring the experimental part of my research program to a close - there was too much to do on the theoretical aspects - and I began the process of winding down the experiments. ↗
The amount of detailed information which an individual has at his command and his theoretical elaborations of the same are mutually dependent; they grow in and through each other. ↗
This kind of overall way of thinking is not only a fertile source of new theoretical ideas: it is needed for the human mind to function in a generally harmonious way, which could in turn help to make possible an orderly and stable society. ↗
