_Conclusion._--In considering the foregoing record of facts it is seen to be a fundamental error, not only in a Hygienic Congress, but in _all_ medical thought and practice, to look only at the body, and not consider those spiritual facts which precede, animate, and succeed the flesh. It is also certain that in the application of hygiene to daily life we may as well pour water into a sieve as hope to enforce permanently practical hygienic measures without enlisting the goodwill of the people in their observance. As the solution of the two great problems of hygiene--viz., ‘What are the laws and conditions of healthy growth?’ and ‘How can these conditions be secured?’ rests upon principles of spiritual truth, those principles are of fundamental importance in directing human intelligence into right lines of investigation. Being compelled to use the imperfect symbolism of language, we speak of mind and matter, of spiritualism and materialism, as if they were separate or contradictory entities. But this is a limitation in the expression of thought to be recognised and carefully guarded against in thought itself. There can be no real contradiction between Religion and Science; they are only varying manifestations in human thought of Truth, which is essentially one. Our effort must be to unite these manifestations in thought, and thus gain the only safe guidance possible to us for practical action. * * * * * The great fundamental principle of our human constitution is incarnation--_i.e._, spirit shaping form--the Universal manifesting itself in the phenomenal. This principle is the foundation of sanitary science. It forms the basis of the Moral Law which must be the guide of science. When this principle is understood and applied, it enlarges the intellect and enlightens the conscience. It transforms the narrow, self-centred or arrogant individual into the humble inquirer and sharer of the larger Diviner life. This universalization of the individual resides essentially in the Will of man, and is the foundation of conscience--conscience which, gradually enlarged by the growing intellect, is the great guide of the human race in its struggle upwards. This universalization of the primitive self-centred life leads to the realization of Sin. When we enter that Garden of Gethsemane where the woes of the world, the murders and seductions, the cruelties and hypocrisies, are revealed in all their hideousness, we realize that we are partakers in this Sin; for it is the result of that self-centred arrogance, that selfishness with which each one has to fight, and which is the essence of Sin. It is through this tremendous conviction that all must enter into that life of the Universal, where alone is true freedom, and where alone the fulness of individual life is to be found. Only by this saturation with the Universal does that hatred of Sin arise which makes sins henceforth impossible.