Axioms of Dianetics by L. Ron Hubbard
Added for usage of Theta θ, Lambda λ and Phi φ in Scientology.
Source: Hubbard, L. (1988) Scientology 0-8 The Book of Basics, Bridge Publications.
Axiom 8: The life static conquers the material universe by learning and applying the physical laws of the physical universe.
SYMBOL: The symbol for the LIFE STATIC in use hereafter is the Greek letter THETA.
Axiom 9: A fundamental operation of THETA in surviving is bringing order into the chaos of the physical universe.
Axiom 10: THETA brings order into chaos by conquering whatever in MEST may be prosurvival and destroying whatever in MEST may be contrasurvival, at least through the medium of life organisms.
SYMBOL: The symbol for the PHYSICAL UNIVERSE in use hereafter is MEST, from the first letters of the words MATTER, ENERGY, SPACE and TIME, or the Greek letter PHI.
Axiom 11: A life organism is composed of matter and energy in space and time, animated by THETA.
SYMBOL: Living organism or organisms will hereafter be represented by the Greek letter LAMBDA.