Think of all the assaults that have been made from this side and the other against Christ and His gospel, and what has become of them all? Travellers tell us how they often see some wandering tribes of savage Arabs trying to move the great stones, for instance, of Baalbec--those wonders of unfinished architecture. But what can a crowd of such people, with all their crowbars and levers, do to the great stone bedded there, where it has been for centuries? They cannot stir it one hair's-breadth. And so, against Jesus Christ and His gospel there has stormed for eighteen hundred years an assaulting crowd, varying in its individuals and in its methods of attack, but the same in its purpose, and the same in the fruitlessness of its effort. Century after century they have said, as they are saying to-day, '_Now_ the final assault is going to be delivered; it can never stand _this_.' And when the smoke has cleared away there may be a little blackening upon the edge, but there is not a chip off its bulk, and it stands in its bed where it did; and of all the grand preparations for a shattering explosion, nothing is left but a sulphurous smell, and a wreath of smoke, and both are floating away down into the distance. Generation after generation has attacked the gospel; generation after generation has been foiled; and I do not need to be a prophet, or the son of a prophet, to be quite sure of this, that all who to-day are trying to destroy men's faith in the Incarnate Son of God, who died for them and rose again, will meet the same fate. I can see the ancient and discredited systems of unbelief, that have gone down into oblivion, rising from their seats, as the prophet in his great vision saw the kings of the earth, to greet the last comer who had fought against God and failed, with 'Art thou also become weak as we? Art thou become like unto us?' The stone will stand, whosoever tries to blow it up with his dynamite, or to pound it with his hammers. But there is the other kind of testing. One proves the foundation by building upon it. If the stone be soft, if it be slender, if it be imperfectly bedded, it will crumble, it will shift, it will sink. But this stone has borne all the weight that the world has laid upon it, and borne it up. Did any man ever come to Jesus Christ with a sorrow that He could not comfort, with a sin that He could not forgive, with a soul that He could not save? And we may trust Him to the end. He is a 'tried stone.' 'This poor man cried, and the Lord heard him, and saved him out of all his troubles,' has been the experience of nineteen centuries. So, being tried, it is precious,--precious to God who laid it there at a great and real cost to Himself--having given up 'His only begotten Son'; precious, inasmuch as building upon it is the one safety from the raging tempest and flood that would else engulf and destroy us. III. Note, next, the process of building.