Great exactness and intelligence is required to discern true Christians, and who these are.
1. Many who appear to be righteous are taken for Christians. It is a task for skilled men and experts to try whether such men have really the stamp and image of the King, lest perchance they should be counterfeits of the works of skilled men, and skilled men wonder at them and criticise them. But people who are not skilled cannot test deceitful workers, for they too wear the shape of monks and Christians. For the false apostles also suffered for Christ, and they also preached the kingdom of heaven. That is why the apostle says In perils more abundant, in afflictions above measure, in prisons more abundant, wishing to show that he had suffered more than they.
2. Gold is easily found; but pearls and precious stones which do for a king’s diadem are seldom found, for many times none that will do are found. So Christians also are built up into the crown of Christ, that those souls may be made partakers with the saints. Glory to Him who so loved that soul, suffered for it, and raised it up from the dead. But as a veil was put over the face of Moses, that the people might not gaze upon his face, so now a veil lies upon your heart, that you may not behold the glory of God. When this is taken away, then He shines forth and manifests Himself to Christians, to those who love Him and seek Him in truth, as He says, I will manifest Myself to him, and will make My abode with him.
3. Let us endeavour then to come to Christ, who cannot lie, that we may obtain the promise, and the new covenant, which the Lord has made new through His cross and death, having burst the gates of hell and sin and brought out the faithful souls, and given them the Comforter within, and brought them into His kingdom. Let us reign then with Him, even we, in Jerusalem, His city, in the heavenly church, in the choir of the holy angels. The brethren who have been long time exercised and tried, these can succour the less experienced, and feel for them.
4. For some who had made themselves sure, and had been mightily worked upon by grace of God, have found their members so sanctified that they reckoned that concupiscence does not occur in Christianity, but that they had acquired a sober and chaste mind, and that from henceforth the inward man was raised aloft to divine and heavenly things, so that they really imagined such an one to have come already to the perfect measures. And when the man imagined that he was already near the calm haven, billows rose up against him, so that he found himself again in the middle of the ocean, and was carried where sea was sky and death was ready. Thus sin entered after all, and wrought all manner of evil concupiscence. And again a certain class of persons having some grace vouchsafed to them, and having received a drop, so to speak, out of the whole deep sea, find it hour by hour, and day by day, such a work of wonder, that the man who is under its influence is amazed and astounded at the strange, surprising operation of God, to think that he should be given such wisdom. After this, grace enlightens him, guides him, gives him peace, makes him good in every way, being itself divine and heavenly, so that in comparison with that man kings and potentates, wise men and nobles are esteemed as least and worthless. After a time and season things change, so that of a truth such a man esteems himself a greater sinner than all others; and again at another season sees himself like a great colossal king, or a king’s powerful friend; again at another season sees himself weak and a beggar. Then the mind falls into perplexity, why things should be thus and then thus. Because Satan in his hatred of the good suggests evil things to those who attain virtue, and strives to overthrow them. That is his occupation.
5. But do not submit to him, while you work at the righteousness that is accomplished in the inner man, where stands the judgment seat of Christ, together with His undefiled sanctuary, that the testimony of your conscience may glory in the cross of Christ, who has purged your conscience from dead works, that you may serve God with your spirit, that you may know what you worship, according to Him who said, We worship that which we know. Obey God who guides you. Let your soul have communion with Christ, as bride with bridegroom. For this mystery is great, it says; but I speak concerning Christ and the blameless soul. To Him be the glory for ever. Amen.