Frege, Gottlob

"A thought grasps a truth or grasps a falsehood."

"The meaning of an expression is its use in the language."

"We must examine our concepts with the greatest care."

"To think logically is to think truly."

"Objects and functions are the furniture of the world."

"The task of philosophy is conceptual clarification."

"Truth is neither created nor discovered; it simply is."

"A thought is a sense-impression of the future."

"The distinction between concept and object is fundamental to all thought."

"Without a sign we cannot have a thought."

"The meaning of a word must lie in the sign itself."

"To have a concept is to grasp a universal truth."

"Mathematics is the purest form of logical thinking."

"A sentence is a name for a truth-value."

"The sense of a word determines what objects it refers to."

"We must distinguish between the sign and what it signifies."

"Thoughts are not private mental entities but objective contents."

"Reference without sense is impossible in meaningful language."

"Every concept carves reality at its joints."

"The force of a judgment lies in its content."

"Language mirrors the structure of logical reality."

"Understanding requires grasping both sense and reference."

"A true proposition corresponds to objective reality."

"Numbers are not physical objects but abstract entities."

"Concepts are fundamentally different from mental images."

"The meaning of a term is what the wise understand by it."

"Logic reveals the structure of all coherent thought."

"We cannot think without language, yet language can mislead us."

"A definition must capture the essential nature of a concept."

"Truth is not a matter of opinion but of objective fact."