A Quote by Friedrich Wilhelm Joseph Schelling

The fear of speculation, the ostensible rush from the theoretical to the practical, brings about the same shallowness in action that it does in knowledge. It is by studying a strictly theoretical philosophy that we become most acquainted with Ideas, and only Ideas provide action with vigour and ethical meaning.
The only knowledge that can truly orient action is knowledge that frees itself from mere human interests and is based in Ideas - in other words knowledge that has taken a theoretical attitude.
Physics has entered a remarkable era. Ideas that were once the realm of science fiction are now entering our theoretical ? and maybe even experimental ? grasp. Brand-new theoretical discoveries about extra dimensions have irreversibly changed how particle physicists, astrophysicists, and cosmologists now think about the world. The sheer number and pace of discoveries tells us that we've most likely only scratched the surface of the wondrous possibilities that lie in store. Ideas have taken on a life of their own.
The Cabal is of two kinds, theoretical and practical, with the practical Cabala, which is engaged in the construction of talismans and amulets, we have nothing to do. The theoretical is divided into the lineal and dogmatic. The dogmatic is nothing more than the summary of the metaphysical doctrine taught by the Cabalist doctors. It is, in other words, the system of the Jewish philosophy.
Isolated facts and experiments have in themselves no value, however great their number may be. They only become valuable in a theoretical or practical point of view when they make us acquainted with the law of a series of uniformly recurring phenomena, or, it may be, only give a negative result showing an incompleteness in our knowledge of such a law, till then held to be perfect.
There are but few who have ideas and are, at the same time, capable of action. Ideas enlarge but stymie, action enlivens but confines.
Theory and knowledge remain suspect, not because of inherent worthlessness, but because of their historic isolation from action. Without theoretical orientation, however, action is vulnerable to oversimplified and glib imitativeness-even mimicry-and to the use of the gimmick.
The research I have been doing - studying how foodstuffs yield energy in living cells - does not lead to the kind of knowledge that can be expected to give immediate practical benefits to mankind. If I have chosen this field of study, it was because I believed in its importance in spite of its theoretical character.
I’m much better at working out ideas in action than I am in theorizing about it and then transferring my thinking to action. I don’t work that way. I work with tentative ideas and I experiment and then with that experimentation in action, I finally come to the conclusions about what I think is the right way to do it.
There's always a tension in my world between the pragmatic and the practical and the theoretical. I have a very theoretical turn of mind, but I also like to test things in place.
You can't learn anything if you are doing all the talking. Sales people should always be developing their earQ, not their IQ. The only way to create a successful sale is to understand that knowledge from listening does not become power until it is used. And ideas without action are worthless.
All of the great ideas, without action, become stale and useless. The key to turning dreams into reality is action. People who have great ideas are a dime a dozen. People who act on their dreams and ideas are the select few, but they are the ones who gain the wealth, wealth and wisdom that is available. Someone will act today. Let it be you.
One advantage of exhibiting a hierarchy of systems in this way is that it gives us some idea of the present gaps in both theoretical and empirical knowledge. Adequate theoretical models extend up to about the fourth level, and not much beyond. Empirical knowledge is deficient at practically all levels.
The theoretical understanding of the world, which is the aim of philosophy, is not a matter of great practical importance to animals, or to savages, or even to most civilised men.
Medicine is the science by which we learn the various states of the human body in health and when not in health, and the means by which health is likely to be lost and, when lost, is likely to be restored back to health. In other words, it is the art whereby health is conserved and the art whereby it is restored after being lost. While some divide medicine into a theoretical and a practical [applied] science, others may assume that it is only theoretical because they see it as a pure science. But, in truth, every science has both a theoretical and a practical side.
It has long been my personal view that the separation of practical and theoretical work is artificial and injurious. Much of the practical work done in computing, both in software and in hardware design, is unsound and clumsy because the people who do it have not any clear understanding of the fundamental design principles of their work. Most of the abstract mathematical and theoretical work is sterile because it has no point of contact with real computing.
Ideas become powerful only if they appear in the flesh; an idea which does not lead to action by the individual and by groups remains at best a paragraph or a footnote in a book.
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