Pure thinking or philosophizing is with a view to philosophy or knowledge as an interconnected system of all sciences or departmental forms of knowledge, the mark of knowledge being its identity for all thinking minds.
The origin of the heresy is to be sought in the Greek, Alexandrine and Oriental philosophizing about the imperfection or rather the essential impurity of matter.
They were followed by an age of philosophizing which did little to advance speculation.
His two most famous definitions are that of virtue as " the doing good to mankind, in obedience to the will of God and for the sake of everlasting happiness," and that of obligation as being urged by a violent motive resulting from the command of another ": both of which bring home to us acutely the limitations of 18th-century philosophizing in general and of theological utilitarianism in particular.
Trendelenburg's philosophizing is conditioned throughout by his loving study of Plato and Aristotle, whom he regards not as opponents but as building jointly on the broad basis of idealism.