Classically it is considered to be one of the most important fundamental principles or laws of thought (along with the principles of identity, non-contradiction and sufficient reason).
In 'Principles,' investor and entrepreneur Ray Dalio shares his approach to life and management, which he believes anyone can use to make themselves more successful.
A basic truth, law, or assumption: the principles of democracy. 2. a. A rule or standard, especially of good behavior: a man of principle. b. The collectivity of moral or ethical standards or judgments: a decision based on principle rather than expediency. 3. A fixed or predetermined policy or mode of action. 4.