The nearer you apprehend yourselves to death and heaven, the greater help you have to be mortified and heavenly. This will make you serious, and keep up right intentions, and keep out wrong ones, and powerfully help you against temptations, that when you have studied to save others, you may not be cast-aways; nor be cheated by the devil with the shell, and leaves, and flowers, while you go without the saving fruit.
I have spoken the more on this subject of governing the thoughts, because it is so great and excellent a part of the work of man; and God doth so much regard the heart; and the Spirit of Christ and Satan so much strive for it; and grace is so much employed about it; and our happiness or misery, joy or sorrow, is greatly promoted by our thoughts. And more I would have said, but that in the third chapter, and in my "Treatise of the Divine Life," there is much said already. And for a method and directions for particular meditations, I have given it at large in the fourth part of the "Saints' Rest," from whence it may easily be taken, and applied to other subjects, as it is there to heaven. It is easy to write and read directions; but I fear lest slothfulness, through the difficulty of practice, will frustrate my directions to the most. But if any profit by them, my labour is not lost.