It is not deeds of all sorts that bring to pass the grandest and most significant changes in the life of humanity, "neither the fitting out of armies a million strong nor the construction of roads and engines, neither the organization of expositions nor the formation of trade-unions, neither revolutions, barricades, and explosions nor inventions in aerial navigation--but the changes of public opinion, and these alone."[1121] Liberation is possible only "by a change in our conception of life";[1122] "everything depends on the force with which each individual man becomes conscious of Christian truth";[1123] "know the truth and the truth shall make you free."[1124] Our liberation must necessarily take place by "the Christian's recognizing the law of love, which his Master has revealed to him, as entirely sufficient for all human relations, and his perceiving the superfluousness and illegitimateness of all violence."[1125] The bringing about of this revolution in public opinion is in the hands of the men who have learned to know the truth.[1126] "A public opinion does not need hundreds and thousands of years to arise and spread; it has the quality of working by contagion and swiftly seizing a great number of men."[1127] "As a jarring touch is enough to change a fluid saturated with salts to crystals in a moment, so now the slightest effort may perhaps suffice to cause the unveiled truth to seize upon hundreds, thousands, millions of men so that a public opinion corresponding to knowledge shall be established and that hereby the whole order of life shall become other than it is. It is in our hands to make this effort."[1128] 2. The best means for bringing about the necessary revolution in public opinion is that the men who have learned to know the truth should testify to it by deed. "The Christian knows the truth only in order to testify to it before those who do not know it,"[1129] and that "by deed."[1130] "The truth is imparted to men by deeds of truth, deeds of truth illuminate every man's conscience, and thus destroy the force of deceit."[1131] Hence you ought properly, "if you are a landlord, to give your land at once to the poor, and, if you are a capitalist, to give your money or your factory to the workingmen; if you are a prince, a cabinet minister, an official, a judge, or a general, you ought at once to resign your position, and, if you are a soldier, you ought to refuse obedience without regard to any danger."[1132] But, to be sure, "it is very probable that you are not strong enough to do this; you have connections, dependents, subordinates, superiors, the temptations are powerful, and your force gives out."[1133] 3. But there is still another means, though a less effective one, for bringing about the necessary revolution in public opinion, and this "you can always"[1134] employ. It is that the men who have learned to know the truth should "speak it out frankly."[1135]