Matthew 7:21

For obeying God's will and not calling on His name, shall find the way to the heavenly kingdom.

(Comm. in 1 Cor. 12:3.) For all truth by whomsoever uttered is from the Holy Spirit.

Wherefore said He not, "but he that doeth my will?" Because for the time it was a great gain for them to receive even this first; yea it was very great, considering their weakness. And moreover He intimated the one also by the other. And withal this may be mentioned, that in fact there is no other will of the Son besides that of the Father. And here He seems to me to be censuring the Jews chiefly, laying as they did the whole stress upon the doctrines, and taking no care of practice. For which Paul also blames them, saying, "Behold thou art called a Jew, and restest in the law, and makest thy boast of God, and knowest His will:" but thou art nothing advantaged thereby, so long as the manifestation by life and by works is not there.

As He had said above that those who have the robe of a good life are yet not to be received because of the impiety of their doctrines; so now on the other hand, He forbids us to participate the faith with those who while they are strong in sound doctrine, destroy it with evil works. For it behoves the servants of God that both their work should be approved by their teaching and their teaching by their works. And therefore He says, Not every one that saith unto me, Lord, Lord, enters into the kingdom of heaven. For Scripture uses to take words for deeds; according to which the Apostle declares, They make confession that they know God, but in works deny him. (Tit. 1:16.)

(Serm. in Mont. ii. 24.) For even in the very name of Christ we must be on our guard against heretics, and all that understand amiss and love this world, that we may not be deceived, and therefore He says, Not every one that saith unto me, Lord, Lord. But it may fairly create a difficulty how this is to be reconciled with that of the Apostle, No man can say that Jesus is the Lord, but by the Holy Ghost. (1 Cor. 12:3.) For we cannot say that those who are not to enter into the kingdom of heaven have the Holy Spirit. But the Apostle uses the word 'say,' to express the will and understanding of him that says it. He only properly says a thing, who by the sound of his voice expresses his will and purpose. But the Lord uses the word in its ordinary sense, for he seems to say who neither wishes nor understands what he says. (non occ.) Let us not therefore think that this belongs to those fruits of which He had spoken above, when one says to our Lord, Lord, Lord; and thence seems to us to be a good tree; the true fruit spoken of is to do the will of God; whence it follows, But who doeth the will of my Father which is in heaven, he shall enter into the kingdom of heaven.