[T]he philosophy of Plotinus has the defect of encouraging men to look within rather than to look without: when we look within we see nous, which is divine, while when we look without we see the imperfections of the sensible world. This kind of subjectivity was a gradual growth; it is to be found in the doctrines of Protagoras, Socrates, and Plato, as well as in the Stoics and Epicureans. But at first it was only doctrinal, not temperamental; for a long time it failed to kill scientific curiosity. [...] Plotinus is both an end and a beginning—an end as regards the Greeks, a beginning as regards Christendom.

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "[T]he philosophy of Plotinus has the defect of encouraging men to look within rather than to look without: when we look within we see nous, which is divine, while when we look without we see the imperfections of the sensible world. This kind of subjectivity was a gradual growth; it is to be found in the doctrines of Protagoras, Socrates, and Plato, as well as in the Stoics and Epicureans. But at first it was only doctrinal, not temperamental; for a long time it failed to kill scientific curiosity. [...] Plotinus is both an end and a beginning—an end as regards the Greeks, a beginning as regards Christendom." in the context of "w:Bertrand Russell (2008), History of Western Philosophy, pages: 296–297, publisher: Simon and Schuster, ISBN: 978-1-4165-9915-9" to mean that wisdom is timeless.