Gregory the Dialogist

It is wonderful that the Lord has represented riches as thorns, for these prick, while those delight, and yet they are thorns, for they lacerate the mind by the prickings of their thoughts, and whenever they entice to see they draw blood, as if inflicting a wound. …

Catena Aurea by Aquinas ↗

Bede

But that which fell among thorns, these are they who have heard, and going forth are choked with cares and riches and pleasures of life, and bring no fruit to perfection. It is remarkable how the Lord interpreted thorns as riches, since thorns prick, and these delight. And yet they are thorns because with the pricks of their thoughts they cut the mind, and when they lead to sin, they wound with inflicted injury. Which in this place, another evangelist witnessing, the Lord does not call riches, but deceitful riches. …

On the Gospel of Luke ↗

Bonaventure

Third, however, as regards the exposition of the seed choked in the busy heart, it is added: That which fell among thorns, these are they who have heard, that is, those are signified by that. And note that hearing is attributed to all, so that no one can excuse himself; Romans 10: "Have they not heard? …

Commentary on Luke, Chapter 8 ↗