The conclusion seems a fair one from these details that, on the whole, the name Simon brings into prominence the natural unrenewed humanity, and the name Peter suggests the Apostolic office, the bold confessor, the impulsive, warm-hearted lover and follower of the Lord. And it is worth noticing that, with one exception, the instances in which he is called by his former name, after his designation to the apostolate, occur in words addressed to him by our Lord.
He had given the name, and surely His withdrawal of it was meant to be significant, and must have struck with boding, rebuking emphasis on the ear and conscience of the apostle. 'Simon, Simon, Satan hath desired to have you': 'Remember thy human weakness, and in the sore conflict that is before thee, trust not to thine own power.' 'Simon, sleepest thou?' 'Can I call thee Peter now, when thou hast not cared for My sorrow enough to wake while I wrestled? Is this thy fervid love?' 'Simon, son of Jonas, lovest thou Me?' 'Thou wast Peter because thou didst confess Me; thou hast fallen back to thine old level by denying Me. It is not enough that in secret I should have restored thee to My love. Here before thy brethren, thou must win back thy forfeited name and place by a confession as open as the denial, and thrice repeated like it. Once thou hast answered, but still thou art "Simon." Twice thou hast answered, but not yet can I call thee "Peter." Thrice thou hast answered, by each reply effacing a former denial, and now I ask no more. Take back thine office; henceforth thou shalt be called "Cephas" as before.'
And so it was. In the Acts of the Apostles, and in Paul's letters, 'Peter' or 'Cephas' entirely obliterates 'Simon.' Only for ease in finding him, the messengers of Cornelius are to ask for him in Joppa by the name by which he would be known outside the Church, and his old companion James begins his speech to the council at Jerusalem by referring with approbation to what 'Simeon' had said, as if he liked to use the old name, that brought back memories of the far-off days in Galilee, before they had known the Master.
Very touching, too, is it to notice how the apostle himself, while using the name by which he was best known in the Church, in the introduction to his first Epistle, calls himself 'Simon Peter' in his second, as if to the end he felt that the old nature clung to him, and was not yet, 'so long as he was in this tabernacle,' wholly subdued under the dominion of the better self, which his Master had breathed into him.
So we see that a bit of biography and an illustration of a large truth are wrapped up for us in so small a matter as the apparently fortuitous use of one or other of these names. I do not suppose that in every instance where either of them occur, we can explain their occurrence by a reference to such thoughts. But still there is an unmistakable propriety in several instances in the employment of one rather than the other, and we may fairly suggest the lesson as put hero in a picturesque form, which Paul gives us in definite words, 'The flesh lusteth against the spirit, and the spirit against the flesh.' The better and the worse nature contend in all Christian souls, or, as our Lord says with such merciful leniency in this very context, 'The spirit is willing, but the flesh is weak.' However real and deep the change which passes over us when 'Christ is formed in us,' it is only by degrees that the transformation spreads through our being. The renewing process follows upon the bestowment of the new life, and works from its deep inward centre outwards and upwards to the circumference and surface of our being, on condition of our own constant diligence and conflict.