Let us suppose that philosophical minds always love knowledge of a sort which shows them the eternal nature not varying from generation and corruption. Agreed. And further, I said, let us agree that they are lovers of all true being; there is no part whether greater or less, or more or less honourable, which they are willing to renounce; as we said before of the lover and the man of ambition. True. And if they are to be what we were describing, is there not another quality which they should also possess? What quality? Truthfulness: they will never intentionally receive into their mind falsehood, which is their detestation, and they will love the truth. Yes, that may be safely affirmed of them. 'May be,' my friend, I replied, is not the word; say rather 'must be affirmed:' for he whose nature is amorous of anything cannot help loving all that belongs or is akin to the object of his affections. Right, he said. And is there anything more akin to wisdom than truth? How can there be? Can the same nature be a lover of wisdom and a lover of falsehood? Never. The true lover of learning then must from his earliest youth, as far as in him lies, desire all truth? Assuredly. But then again, as we know by experience, he whose desires are strong in one direction will have them weaker in others; they will be like a stream which has been drawn off into another channel. True. He whose desires are drawn towards knowledge in every form will be absorbed in the pleasures of the soul, and will hardly feel bodily pleasure--I mean, if he be a true philosopher and not a sham one. That is most certain. Such an one is sure to be temperate and the reverse of covetous; for the motives which make another man desirous of having and spending, have no place in his character. Very true. Another criterion of the philosophical nature has also to be considered. What is that? There should be no secret corner of illiberality; nothing can more antagonistic than meanness to a soul which is ever longing after the whole of things both divine and human. Most true, he replied. Then how can he who has magnificence of mind and is the spectator of all time and all existence, think much of human life? He cannot. Or can such an one account death fearful? No indeed. Then the cowardly and mean nature has no part in true philosophy? Certainly not. Or again: can he who is harmoniously constituted, who is not covetous or mean, or a boaster, or a coward-can he, I say, ever be unjust or hard in his dealings? Impossible. Then you will soon observe whether a man is just and gentle, or rude and unsociable; these are the signs which distinguish even in youth the philosophical nature from the unphilosophical. True. There is another point which should be remarked. What point? Whether he has or has not a pleasure in learning; for no one will love that which gives him pain, and in which after much toil he makes little progress. Certainly not.