X. _Preached August 11, 1850._ PURITY. "Unto the pure all things are pure: but unto them that are defiled and unbelieving is nothing pure; but even their mind and conscience is defiled."--Titus i. 15. For the evils of this world there are two classes of remedies--one is the world's, the other is God's. The world proposes to remedy evil by adjusting the circumstances of this life to man's desires. The world says, give us a perfect set of _circumstances_, and then we shall have a set of perfect men. This principle lies at the root of the system called Socialism. Socialism proceeds on the principle that all moral and even physical evil arises from unjust laws. If the cause be remedied, the effect will be good. But Christianity throws aside all that as merely chimerical. It proves that the fault is not in outward circumstances, but in ourselves. Like the wise physician, who, instead of busying himself with transcendental theories to improve the climate, and the outward circumstances of man, endeavours to relieve and get rid of the tendencies of disease which are from within, Christianity, leaving all outward circumstances to ameliorate themselves, fastens its attention on the spirit which has to deal with them. Christ has declared that the kingdom of heaven is from within. He said to the Pharisee, "Ye make clean the outside of the cup and platter, but within ye are full of extortion and excess." The remedy for all this is a large and liberal charity, so overflowing that "Unto the pure all things are pure." To internal purity all external things _become_ pure. The principle that St. Paul has here laid down is, that each man is the creator of his own world; he walks in a universe of his own creation. As the free air is to one out of health the cause of cold and diseased lungs, so to the healthy man it is a source of greater vigour. The rotten fruit is sweet to the worm, but nauseous to the palate of man. It is the same air and the same fruit acting differently upon different beings. To different men a different world--to one all pollution--to another all purity. To the noble all things are noble, to the mean all things are contemptible. The subject divides itself into two parts. I. The apostle's principle. II. The application of the principle. Here we have the same principle again; each man creates his own world. Take it in its simplest form. The eye creates the outward world it sees. We see not things as they are, but as God has made the eye to receive them.