The third incident occurred immediately afterwards. I was invited by Trinity College, Cambridge, to become a lecturer, but not a Fellow. The difference is not pecuniary; it is that a Fellow has a voice in the government of the College, and cannot be dispossessed during the term of his Fellowship except for grave immorality. The chief reason for not offering me a Fellowship was that the clerical party did not wish to add to the anti-clerical vote. The result was that they were able to dismiss me in 1916, when they disliked my views on the War.[1] If I had been dependent on my lectureship, I should have starved. These three incidents illustrate different kinds of disadvantages attaching to avowed freethinking even in modern England. Any other avowed Freethinker could supply similar incidents from his personal experience, often of a far more serious character. The net result is that people who are not well-to-do dare not be frank about their religious beliefs. It is not, of course, only or even chiefly in regard to religion that there is lack of freedom. Belief in communism or free love handicaps a man much more than Agnosticism. Not only is it a disadvantage to hold those views, but it is very much more difficult to obtain publicity for the arguments in their favour. On the other hand, in Russia the advantages and disadvantages are exactly reversed: comfort and power are achieved by professing Atheism, communism, and free love, and no opportunity exists for propaganda against these opinions. The result is that in Russia one set of fanatics feels absolute certainty about one set of doubtful propositions, while in the rest of the world another set of fanatics feels equal certainty about a diametrically opposite set of equally doubtful propositions. From such a situation war, bitterness, and persecution inevitably result on both sides. William James used to preach the “will to believe.” For my part, I should wish to preach the “will to doubt.” None of our beliefs are quite true; all have at least a penumbra of vagueness and error. The methods of increasing the degree of truth in our beliefs are well known; they consist in hearing all sides, trying to ascertain all the relevant facts, controlling our own bias by discussion with people who have the opposite bias, and cultivating a readiness to discard any hypothesis which has proved inadequate. These methods are practised in science, and have built up the body of scientific knowledge. Every man of science whose outlook is truly scientific is ready to admit that what passes for scientific knowledge at the moment is sure to require correction with the progress of discovery; nevertheless, it is near enough to the truth to serve for most practical purposes, though not for all. In science, where alone something approximating to genuine knowledge is to be found, men’s attitude is tentative and full of doubt.