How came I to wander into doubt and unbelief? 1. There are several causes of skepticism and infidelity. One is vice. When a man is bent on forbidden pleasures, he finds it hard to believe in the truth and divinity of a religion that condemns his vicious indulgences. And the longer he persists in his evil course, the darker becomes his understanding, the more corrupt his tastes, and the more perverse his judgment; until at length he "puts darkness for light, and light for darkness; calls evil good and good evil, and mistakes bitter for sweet, and sweet for bitter." He becomes an infidel. It is the decree of Heaven that men who persist in seeking pleasure in unrighteousness, shall be given up to strong delusions of the devil to believe a lie. 2. But there are other causes of skepticism and unbelief besides vice. Thomas was an unbeliever for a time,--a very resolute one,--yet the Gospel gives no intimation that he was chargeable with any form of vice. And John the Baptist, one of the noblest characters in sacred history, after having proclaimed Jesus as the Messiah to others, came himself to doubt, whether He was really "the one that should come, or they should look for another." Like the early disciples of the Saviour, and the Jewish people generally, John expected the Messiah to take the throne of David by force, and to rule as a temporal prince; and when Jesus took a course so very different, his confidence in his Messiahship was shaken. And one of the sweetest Psalmists tells us that, as for him, his feet were almost gone; his steps had well-nigh slipped: and that, not because he was eager for sinful pleasures, but because he saw darkness and clouds around the Providence of God: he could not understand or "justify the ways of God to man." And there are thoughtful and good men still who fall into doubt and unbelief from similar causes. The kind of people who, like Thomas, are constitutionally inclined to doubt, are not all dead. Baxter mentions a class of men who lived in his day, that were always craving for sensible demonstrations. Like Thomas, they wanted to _see_ and _feel_ before they believed. In other words, they were not content with faith; they wanted _knowledge_. And there are men of that kind still in the world. And the darkness and clouds which the Psalmist saw around the providence of God are not all gone. There are many things in connection with the government of the world that are hard to be understood,--hard to be reconciled by many with their ideas of what is right. There are mysteries both in nature and in history, which baffle the minds and try the faith of the best and wisest of our race. 3. And there are matters in connection with Christianity to try the faith of men. Like its great Author, when it first made its appearance, it had "neither form nor comeliness" in the eyes of many. It neither met the expectations of the selfish, proud, ambitious Jew, nor of the disputatious, philosophic Greek. To the one "it was a stumbling-block," and to the other "foolishness." And there have been men in every age,