"In this inevitable struggle [between vanishing old ideas and incoming new ones] there has always been more or less pain, and hence free thought has not usually been popular. It has come to our life-feast as a guest unbidden and unwelcome; but it has come to stay with us, and already proves more genial than was expected. Deadening, cramping finality has lost its" charm for him who has tasted of the ripe fruit of the tree of knowledge. In this broad universe of God's wisdom and love, not leashes to restrain us are needed, but wings to sustain our flight. Let bold but reverent thought go on and probe creation's mysteries, till faith and knowledge "make one music as before, but vaster." IX. THE RIGHT TO SEEK KNOWLEDGE ASIDE FROM REVEALED KNOWLEDGE. One other thing: Such subjects as are treated in this Year Book necessarily rest on what God has revealed--that is, for the data, the facts involved; but that does not necessarily hold as to illustration and argument for development of the truth and making clear the revealed things of God. Here one may do as it is said Clement of Alexandrea did in urging men to strive for a knowledge of Christian truth, rather than a mere belief of it; "such instruction was to come primarily from the 'Divine Word'; but everything in the range of human learning was to be welcomed as co-operating with him. For Clement gratefully acknowledged truth wherever found, whether among heathens or heretics." It should be observed, however, "that while constantly confirming his propositions from his Greek writers, he ever turns for a final appeal to the scriptures"--that, too, must be our course. So much by way of presenting the spirit in which I have pursued my own studies upon the high themes of these Seventy's Year Books, and this present one in particular. X. JUSTIFICATION FOR USING DOUBLE TITLE. The subject of Divine Immanence and the Holy Ghost should be considered together because there are such relations and apparent contrasts subsisting between them--such a likeness and such apparent differences, that they may properly be understood only when so considered--that is, conjointly.