If a man, for example, believes that he is to please God by a sacrifice, by an offering, by swinging incense, by going through a certain ceremony, instead of being righteous and true, does it make no difference? Carry out the idea as far as you please, I think I have made plain the thought I had in mind. So it does make a difference what our thoughts, our theories, may be; and, therefore, there is good in this work of investigation which proposes to sift and test and try things, and find out the real nature of the forces which confront us and with which we have to deal. Now, then, I come to the positive answering of our question. Are there some things that doubt cannot touch? And are these things the most important ones, the ones that we need to feel solid under our feet? What do we need? We do not need to be able to unravel all the mysteries of the universe. Any quantity of the questions we ask are not practical ones. We do not need to wait for an answer to them. Any number of the things that are in doubt are of no practical consequence; and we need not wait for their settlement before we begin to live and to help our fellowmen and to do what we can to bring in the coming kingdom of our Father. I wish to note now a few of the things that seem to me very stable things, that doubt cannot disturb. And first I will say that which I mean when I use the word "God." I wish you to learn to separate between the word and the reality. Sometimes people are quarrelling over a label instead of the reality that is back of all. I care very little for a name. I care for things, for the eternal truths of the universe. May we then feel that modern doubt does not touch our belief in God? I ask you to consider a moment, and see. As we wake up, assuming nothing, and look abroad, what do we find? We find ourselves in the presence of a Power that is not ourselves, another Power, a Power that was here before we were born, a Power that will be here after we have died, a Power that has produced us, and so is our father and mother on any theory you choose to hold of it, a Power out of which we have come. Now suppose we look abroad, and try to find something in regard to the nature of this Power. We can conceive no beginning: we can conceive no end. And let me say right here that, as the result of all his lifelong study and thinking as an evolutionist, Mr. Herbert Spencer has said that the existence of this infinite and eternal Power, of which all the phenomenal universe is only a partial and passing manifestation, is the one item of human knowledge of which we are most certain of all.