A theoretical grounding in agronomy must, therefore, include knowledge of biological laws.
Trofim Lysenko

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.
Talcott Parsons

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.
Rudolph A. Marcus

After some minor pieces of theoretical study that I worked on, a student in my statistical mechanics class brought to my attention a problem in polyelectrolytes.
Rudolph A. Marcus

Although they can do it all the time, you know, they're far better than me, on a musically, on a theoretical music level. You know, they're out of my league.
Eric Clapton

As a theoretical physicist, I feel at once proud and humble at the thought of the illustrious figures that have preceded me here to receive the greatest of all honors in science, the Nobel prize.
Murray Gell-Mann

Because of recent improvements in the accuracy of theoretical predictions based on large scale ab initio quantum mechanical calculations, meaningful comparisons between theoretical and experimental findings have become possible.
Yuan T. Lee

Close contact between science and the practice of collective farms and State farms creates inexhaustible opportunities for the development of theoretical knowledge, enabling us to learn ever more and more about the nature of living bodies and the soil.
Trofim Lysenko

Darwin himself, in his day, was unable to fight free of the theoretical errors of which he was guilty. It was the classics of Marxism that revealed those errors and pointed them out.
Trofim Lysenko

For in the theoretical field bourgeois economics no longer engages in blithe and joyous fights.
Rudolf Hilferding

I am now convinced that theoretical physics is actually philosophy.
Max Born

I recognise that Socialism has ended its purely theoretical course, and that the hour to construct has come.
John Burns

I studied economics and made it my career for two reasons. The subject was and is intellectually fascinating and challenging, particularly to someone with taste and talent for theoretical reasoning and quantitative analysis.
James Tobin

I think I was first awakened to musical exploration by Dizzy Gillespie and Bird. It was through their work that I began to learn about musical structures and the more theoretical aspects of music.
John Coltrane

I think philosophers can do things akin to theoretical scientists, in that, having read about empirical data, they too can think of what hypotheses and theories might account for that data. So there's a continuity between philosophy and science in that way.
Robert Nozick

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.
Karl Jaspers

If the experimental physicist has already done a great deal of work in this field, nevertheless the theoretical physicist has still hardly begun to evaluate the experimental material which may lead him to conclusions about the structure of the atom.
Johannes Stark

If the highest things are unknowable, then the highest capacity or virtue of man cannot be theoretical wisdom.
Leo Strauss

In a few decades of reconstruction, even the mathematical natural sciences, the ancient archetypes of theoretical perfection, have changed habit completely!
Edmund Husserl

In some theoretical way I know that a half-million people hear the show. But in a day-to-day way, there's not much evidence of it.
Ira Glass