大毘盧遮那成佛經疏 2.69

2.69

第四十「云何刺心？謂一切處惡作為性」者，猶如棘叢，於一切處多所損妨，令近者不安。此心亦爾，若行善事如大施等，既作已便生追悔之心。若作惡事竟，復自思惟亦懷慚懼。是故常懷惡作，動慮不安。此中對治法，若有犯速務懺除，勿生掉悔。所為善事，應自思惟生慶幸心。

The fortieth: "What is the thorn mind? It is having an unwholesome deed as its nature in all situations." Just as a thorn thicket causes much harm and obstruction everywhere, unsettling anyone who draws near; this mind is also like this: if it performs a wholesome deed such as great generosity, upon finishing it immediately generates regret. If it finishes doing an unwholesome deed, upon reflecting it also harbors shame and fear. For this reason, it constantly harbors remorse over unwholesome deeds, restless with turbulent thoughts. The antidote here is: if there is an infraction, apply oneself swiftly to confess and eliminate it, without generating agitation and remorse. For wholesome deeds done, one should reflect upon them and generate joy.