1 ;;Quote: the object of all science is to coordinate our experiences and to bring them into a logical system

2 ;;Quote: regard as real those sense perceptions which are common to different individuals and hence impersonal; e.g., rigid bodies

2+;;Quote: a clock is a body or system that counts a series of events which can be regarded as equal

2 ;;Quote: concepts represent the complex of our experiences; no other justification

2+;;Quote: physicists have changed the concepts of time and space to fit experience; were a priori

3 ;;Quote: space is relative to a body; it is all possible continuations of a body by adjacent bodies

30 ;;Quote: physical reality consists of spacetime events; no rational division into a 3d space and a time continuum; laws of nature must correspond

38 ;;Quote: events outside of the light cone from event P have a timelike relation to P; those inside have a spacelike relation

46 ;;Quote: E= m c^2, i.e., mass and energy are essentially alike

46+;;Quote: the kinetic energy of an object in classical mechanics is the second term of the equation relating energy to mass and velocity

57 ;;Quote: coordinate systems for inertial systems and uniformly accelerated systems or gravitational systems are physically equivalent; makes general relativity much better than classical mechanics

61 ;;Quote: the gravitational field determines the metrical laws of the spacetime continuum; only infinitesimal regions are nongravitational with Euclidean geometry

61 ;;Quote: laws of nature should be valid in any 4d system of coordinates that preserves neighboring events; like Gauss's theory of surfaces

129 ;;Quote: the big bang is the beginning of the world but field equations and field variables have no real significance; avoids question of singularities

165 ;;Quote: reality should have a purely algebraic theory since quantum phenomena are completely described by a finite set of numbers; not a continuous field
