I have been very deeply exercised in my soul, more so than in all the fifty years that Christ Jesus has been precious to me, a poor sinner, and this particular exercise of my soul you will learn in reading, what I now write, and which I hope will be of profit to you, and cause you to examine yourselves, whether ye be in the faith; prove your own selves. Know ye not your own selves how Jesus Christ is in you, except ye be reprobates? (2 Cor. 1.3:5).