The Credit System
The whole world is carried on on the credit system; if every one were to demand payment in hard cash, there would be universal bankruptcy. We think as we do mainly because other people think so. But if every one stands on every one else, what does the bottom man stand on? Faith is no foundation, for it rests in the end on reason. Reason is no foundation, for it rests upon faith.
Argument
We are not won by argument, which is like reading and writing and disappears when there is need of such vanity, or like colour that vanishes with too much light or shade, or like sound that becomes silence in the extremes. Argument is useless when there is either no conviction at all or a very strong conviction. It is a means of conviction and as such belongs to the means of conviction, not to the extremes. We are not won by arguments that we can analyse, but by tone and temper, by the manner which is the man himself.
Logic and Philosophy
When you have got all the rules and all the lore of philosophy and logic well into your head, and have spent years in getting to understand at any rate what they mean and have them at command, you will know less for practical purposes than one who has never studied logic or philosophy.
Science
If it tends to thicken the crust of ice on which, as it were, we are skating, it is all right. If it tries to find, or professes to have found, the solid ground at the bottom of the water, it is all wrong. Our business is with the thickening of this crust by extending our knowledge downward from above, as ice gets thicker while the frost lasts; we should not try to freeze upwards from the bottom.
Religion
A religion only means something so certainly posed that nothing can ever displace it. It is an attempt to settle first principles so authoritatively that no one need so much as even think of ever re-opening them for himself or feel any, even the faintest, misgiving upon the matter. It is an attempt to get an irrefragably safe investment, and this cannot be got, no matter how low the interest, which in the case of religion is about as low as it can be.