A System of philosophy, a comprehensive world-view, is a work of art, although it is also more than that. Already Plato described the philosopher as a poet, and Plato himself was a great poet as well as a great philosopher. In recent years Professor Alexander has explained, on various occasions, that there is artistry involved in all scientific and philosophic thought. They demand creative intellectual construction of a high order. In so far as this is true, as I believe it is, it should be possible, sometimes at least, to contemplate a great system of philosophy as a work of art, to enjoy it in a spirit of detachment, above the noise and the tumult of conflicting personal convictions.It is more or less in this spirit that I propose on this occasion to deal with some of the fundamental ideas of Spinoza. That, I believe, is in accordance with his own wishes. He wanted his works to be published anonymously, so that his philosophy might be considered impersonally, entirely on its own merits. Such a method of treatment may in any case be most suitable on this occasion when, in spite of probably great divergences in our individual views, we have come together to do honour to his memory. This kind of personal tribute may be contrary to his own wishes. But we owe it to ourselves, and to mankind at large, to keep alive the remembrance of one of the greatest masters of the art of high thinking and plain living.