German Physicist Quotes
The highest object to which the natural sciences are constrained to aim, but which they will never reach, is the determination of the forces, which are present in nature, and of the state of matter at any given moment - that is, the reduction of all the phenomena of nature to mechanics.
Only after the atom has lost the last sensible quality does its true meaning for the physical world view become clear; the unity — real, though remote from our immediate perception — of all that our perception knows only as a multitude of appearances is systematically held together and symbolically represented in it, but not mechanically explained.
While it is true that theory often sets difficult, if not impossible tasks for the experiment, it does, on the other hand, often lighten the work of the experimenter by disclosing cogent relationships which make possible the indirect determination of inaccessible quantities and thus render difficult measurements unnecessary.
It is usually the fate of good physical theory that after its initial success, difficulties or limitations of its applicability become apparent. Eventually it is superseded by a better theory in which some of the difficulties are removed or which has a wider field of application, as the case may be.
The universe is more than merely an accretion of electrons, quarks, and galaxies, more than space and time. The complex, interrelated world of the earth which created us is part of it. It is our duty not only to ourselves to preserve this world. The universe itself imposes this task on us.