This book deals with the Christian philosophy of love.

Jesus taught his philosophy of life in three ways: the personal, by example; the artistic, by parable; and the scientific, by propositions.

The first, though most vital and effective of all, is expensive and wasteful. For in life principles are so embedded in "muddy particulars," trivial and sordid details, that they are liable to get lost. The Master may be a long time with His disciples, and yet not really be known. Even the disciples themselves, after months of such teaching, like James and John may not know what manner of spirit they are of. Indeed it may become expedient for them that the Master go away, that His Spirit may be more clearly revealed.

The artistic method, too, has drawbacks. For though it gives the principles a new artificial setting, with carefully selected details to catch the crowd, yet the crowd catch simply the story. Only the initiated are instructed; those who do not already know the principles learn nothing, but "seeing they do not see, and hearing they do not understand," as Jesus, past master of this art though He was, so often lamented.

The third or scientific method is dry and prosaic. It observes what qualities go together, or refuse to go together, in the swift stream of life; pulls them out of the stream; fixes them in concepts; marks them by names; and states propositions about them. It may go one short step farther: it may arrange its propositions in syllogisms, and deduce general conclusions, or laws. It may take, for instance, as its major premise, Love is the divine secret of blessedness...