If you preach anything else except the new birth you will always get on well with your hearers; but if you insist that in order to enter heaven there must be a radical change, though this is the doctrine of the Scripture, it is so unpalatable to mankind in general that you will scarcely get them to listen. Ah! now ye turn away if I begin to tell you, that “except ye be born of water and of the Spirit, ye cannot enter the kingdom of heaven.” If I tell you that there must be a regenerating influence exerted upon your minds by the power of the Holy Ghost then I know ye will say “it is enthusiasm.” Ah! but it is the enthusiasm of the Bible. There I stand; by this I will be judged. If the Bible does not say we must be born again, then I give it up; but if it does then, sirs, do not distrust that truth on which your salvation hangs.
From the Metropolitan Tabernacle Pulpit, Volume 1, Sermon 14 by Charles Haddon Spurgeon
As the sufferings of Christ abound in us so the consolations of Christ abound. Here is a blessed proportion. God always keeps a pair of scales—in this side he puts his people’s trials and in that he puts their consolations. When the scale of trial is nearly empty, you will always find the scale of consolation in nearly the same condition; and when the scale of trials is full, you will find the scale of consolation just as heavy for as the sufferings of Christ abound in us, even so shall consolation abound by Christ. This is a matter of pure experience. Some of you do not know anything at all about it. You are not Christians, you are not born again, you are not converted; ye are unregenerate, and, therefore, ye have never realized this wonderful proportion between the sufferings and the consolations of a child of God. Oh! it is mysterious that, when the black clouds gather most, the light within us is always the brightest. When the night lowers and the tempest is coming on, the heavenly captain is always closest to his crew. It is a blessed thing, when we are most cast down, then it is that we are most lifted up by the consolations of Christ.
From the Metropolitan Tabernacle Pulpit, Volume 1, Sermon 13 by Charles Haddon Spurgeon