If we consider the philosophical tendencies of the day, we shall probably observe first of all that the artificial wall of partition between philosophy and science--and especially mathematical science--is beginning to wear very thin. On the other hand, we cannot fail to notice a reaction against what is called intellectualism. This reaction takes many forms, the most characteristic perhaps of which is a renewed interest in Mysticism. It leads also to a strong insistence on the practical aspect of philosophic thought, and to a view of its bearing on what had been regarded as primarily theoretical issues, which is known by the rather unfortunate name of Pragmatism. Now it is just on these points that we have most to learn from the Greeks, and Greek philosophy is therefore of special importance for us at the present time. At its best, it was never divorced from science, while it found a way of reconciling itself both with the interests of the practical life and with mysticism without in any way abating the claims of the intellect. It is solely from these points of view that it is proposed to regard Greek philosophy here. It would be futile to attempt a summary of the whole subject in the space available, and such a summary would have no value. Many things will therefore be passed over in silence which are important in themselves and would have to be fully treated in a complete account. All that can be done now is to indicate the points at which Greek philosophy seems to touch our actual problems. It will be seen that here, as elsewhere, 'all history is contemporary history', and that the present can only be understood in the light of the past.