Accordingly the inverted application of the same principle which gives rise to liberty and power constitutes the entanglement from which we need to be delivered before power and liberty can be attained, and this principle is expressed in the law that "as a man thinks so he is." This is the basic law of the human mind. It is Descarte's "_cogito, ergo sum_." If we trace consciousness to its seat we find that it is purely subjective. Our external senses would cease to exist were it not for the subjective consciousness which perceives what they communicate to it. The idea conveyed to the subjective consciousness may be false, but until some truer idea is more forcibly impressed in its stead it remains a substantial reality to the mind which gives it objective existence. I have seen a man speak to the stump of a tree which in the moonlight looked like a person standing in a garden, and repeatedly ask its name and what it wanted; and so far as the speaker's conception was concerned the garden contained a living man who refused to answer. Thus every mind lives in a world to which its own perceptions give objective reality. Its perceptions may be erroneous, but they nevertheless constitute the very reality of life for the mind that gives form to them. No other life than the life we lead in our own mind is possible; and hence the advance of the whole race depends on substituting the ideas of good, of liberty, and of order for their opposites. And this can be done only by giving some sufficient reason for accepting the new idea in place of the old. For each one of us our beliefs constitute our facts, and these beliefs can be changed only by discovering some ground for a different belief. This is briefly the rationale of the maxim that "as a man thinks so he is"; and from the working of this principle all the issues of life proceed. Now man's first perception of the law of cause and effect in relation to his own conduct is that the result always partakes of the quality of the cause; and since his argument is drawn from external observation only, he regards external acts as the only causes he can effectively set in operation. Hence when he attains sufficient moral enlightenment to realise that many of his acts have been such as to merit retribution he fears retribution as their proper result. Then by reason of the law that "thoughts are things," the evils which he fears take form and plunge him into adverse circumstances, which again prompt him into further wrong acts, and from these come a fresh crop of fears which in their turn become externalised into fresh evils, and thus arises a circulus from which there is no escape so long as the man recognises nothing but his external acts as a causative power in the world of his surroundings.