But since the natural passions are common to all men, we do not specify those passions by some distinctive word, applied to some individual who shares our common nature, as when we say, John is the friend of Martin, we do not mean to signify merely the natural love which all men bear to all men, but we mean the friendship founded upon the natural love which is distinct and peculiar to certain individuals. Thus we do not term any one a philosopher because of the love common to us all. It is the intention or meaning of Aristotle, in the eighth book of the Ethics, that that man may be called a friend whose friendship is not concealed from the person beloved, and to whom also the beloved person is a friend, so that the attachment is mutual; and this must be so either for mutual benefit, or for pleasure, or for credit's sake. And thus, in order that a man may be a philosopher, it must be love to Wisdom which makes one of the sides friendly; it must be study and care which make the other side also friendly, so that familiarity and manifestation of benevolence may spring up between them; because without love and without study one cannot be called a philosopher, but there must be both the one and the other. And as friendship for the sake of pleasure given or for profit is not true friendship, but accidental, as the Ethics demonstrate, so philosophy for delight or profit is not true philosophy, but accidental. Wherefore one ought not to call him a true philosopher who for some pleasure or other may be a friend of Wisdom in some degree; even as there are many who take delight in repeating songs and in studying the same, and who delight in studying Rhetoric and Music, and who avoid and abandon the other Sciences, which are all members of Wisdom's body. One ought not to call him a true philosopher who is the friend of Wisdom for the sake of profit; such as are the Lawyers, Doctors, and almost all the Religious Men, who do not study for the sake of knowledge, but to acquire money or dignity; and if any one would give them that which they seek to acquire, they would not continue to study. And as amongst the various kinds of friendship, that which is for profit may be called the meanest friendship, so such men as these have less share in the name of Philosopher than any other people.