There are occasions when this strengthening and vivifying action of society is especially apparent. In the midst of an assembly animated by a common passion, we become susceptible of acts and sentiments of which we are incapable when reduced to our own forces; and when the assembly is dissolved and when, finding ourselves alone again, we fall back to our ordinary level, we are then able to measure the height to which we have been raised above ourselves. History abounds in examples of this sort. It is enough to think of the night of the Fourth of August, 1789, when an assembly was suddenly led to an act of sacrifice and abnegation which each of its members had refused the day before, and at which they were all surprised the day after.[683] This is why all parties, political, economic or confessional, are careful to have periodical reunions where their members may revivify their common faith by manifesting it in common. To strengthen those sentiments which, if left to themselves, would soon weaken, it is sufficient to bring those who hold them together and to put them into closer and more active relations with one another. This is the explanation of the particular attitude of a man speaking to a crowd, at least if he has succeeded in entering into communion with it. His language has a grandiloquence that would be ridiculous in ordinary circumstances; his gestures show a certain domination; his very thought is impatient of all rules, and easily falls into all sorts of excesses. It is because he feels within him an abnormal over-supply of force which overflows and tries to burst out from him; sometimes he even has the feeling that he is dominated by a moral force which is greater than he and of which he is only the interpreter. It is by this trait that we are able to recognize what has often been called the demon of oratorical inspiration. Now this exceptional increase of force is something very real; it comes to him from the very group which he addresses. The sentiments provoked by his words come back to him, but enlarged and amplified, and to this degree they strengthen his own sentiment. The passionate energies he arouses re-echo within him and quicken his vital tone. It is no longer a simple individual who speaks; it is a group incarnate and personified.