Augustine of Hippo

Did not the Virgin Mary do the will of the Father, who believed in faith, conceived in faith, was chosen from whom salvation would be born among men, was created by Christ before Christ was created in her? Holy Mary indeed did the will of the Father: and for this reason, it is greater for Mary to have been a disciple of Christ than to have been the mother of Christ: it is greater, it is more blessed to have been a disciple of Christ than to have been the mother of Christ. …

Sermon 72/A ↗

Ambrose of Milan

Nor does He overthrow the duty of filial submission, which is conveyed in the command, Honour thy father and thy mother, (Ex. 20:12.) but shows that He owes more to the mysteries and relationship of His Father, than of His mother; as it follows, And stretching out his hand to his disciples, he said, Behold my mother and my brethren.

Catena Aurea by Aquinas ↗

Jerome

Behold my mother and my brothers. For whoever does the will of my Father who is in heaven, he is my brother and sister and mother. These are my mother, who daily begets me in the souls of believers. These are my brothers, who do the works of my Father. Therefore, he did not deny his mother, as Marcion and Manichaeus believed, that he was born from a phantom; but he preferred the apostles to kinship, so that we may also prefer the spirit to the flesh in comparison of love. …

Commentary on Matthew ↗