There are outward ways and duties by which our spiritual affections are expressed. Their rule also is the Scripture. The way marked out in it is the only channel in which the stream of spiritual affections takes its course to God. The graces required in it are acted by the affections; the duties it prescribes are those which they stir up and enliven; the religious worship it appoints is that in which they have their exercise. Where this rule has been neglected, men's religious affections have grown irregular, indeed, wild and ungovernable.