Jesus takes the most familiar facts and objects to convey the truths and doctrines which He wished to communicate. Here he uses for illustration an object, with the properties and uses of which everybody is familiar—namely, salt. It is good to prevent corruption and to preserve life. Without it life could not continue. I have heard of a party of travelers whose supply of salt almost gave out; and not having enough for themselves and their horses, the horses grew weak, would stagger, and finally fall and die, though they had food for them. Yet the lack of salt could not be supplied by any amount of food.
So it is with Christianity. It prevents corruption, moral corruption, in the individual, and so prevents social corruption, political corruption, national corruption, and is the means of purification in all these respects. But it not only prevents corruption, it imparts spiritual life and vigor and sends its possessors on their way filled with an energy that goes out after others.
Christianity is suited to be the salt of the earth. It demands a perfect morality, a perfect righteousness, and offers the highest motives to men to attain this. It teaches, with assurance, that there is a righteous God who demands holiness on our part, and, at the same time, it encourages men and inspires them with hope because it declares that this God loves men, as sinners, and so it gets hold of men by the heart.
If man will only compare those nations that are Christian with those that are not, he will find out what a difference there is.
But the text refers to the holy lives of Christians as being the salt of the earth.
The savor of Christians is an unction from the spirit of God that produces purity, humility, patience, long-suffering, self-denial, tenderness, sympathy and unselfish love.
And when men see a person whose daily life presents all these beauties, they are forced to pause and regard it. It is such an unnatural and such an unearthly thing that they can not help it. And it is far more convincing and eloquent than all logic and rhetoric put together. There is no way of getting around it. Men know that a gifted orator can dress things up so as to make any cause seem a fair and plausible one, but men know also that neither a gifted orator nor any one less than God can make men humble, pure, patient, gentle, long-suffering, unselfish and glad to spend and be spent for others than themselves.
When men see such a life, they seek to know how it is realized, and finding that Christianity has done it, that faith in Jesus has done it, they are constrained to say: "We know that Christianity is from God. For nothing could do such wonderful miracles except God be in it," as Nicodemus said to Jesus.
There are so many men who are anxiously inquiring about spiritual things and about God and a future life. And they say: "Show us something that Christianity can do." And if we are living such lives, they find what they are seeking for and are satisfied. But there are many men who won't search the Bible to find out if it is true—and many who don't do so for want of time and of opportunity—and some who can't do so because they can't read or reason, and we force Christianity upon their attention by the beauty and unearthliness of holy Christian lives. Instead of waiting for them to come inquire and into Christianity, which they might never do, we carry it before their eyes in its loveliest and most attractive and powerful form when we live holy lives before them. And when men see many people living thus, it turns the tide of their feelings, reverses the current of their thoughts, and makes it easy instead of difficult to believe. Oh, that we had more of these entirely consecrated lives! They would do far more good than the preaching. When people see these consecrated women doing the work they do for the poor neglected children, they say: "Ah, now, that looks like something, sure enough, and we believe in that sort of religion." John Wesley said: "Give me one hundred men who love nothing but God, and who fear nothing but sin, and we will soon lay England at Jesus' feet."
How can we get and keep this savour, this divine unction which produces such a life? Only by much communion with God.