Whether thoughtlessness is a special sin included in prudence?

❌ Objection 1 : It would seem that thoughtlessness is not a special sin included in imprudence. For the Divine law does not incite us to any sin, according to Ps. 18:8, "The law of the Lord is unspotted"; and yet it incites us to be thoughtless, according to Mt. 10:19, "Take no thought how or what to speak." Therefore thoughtlessness is not a sin.

❌ Objection 2 : Further, whoever takes counsel must needs give thought to many things. Now precipitation is due to a defect of counsel and therefore to a defect of thought. Therefore precipitation is contained under thoughtlessness: and consequently thoughtlessness is not a special sin.

❌ Objection 3 : Further, prudence consists in acts of the practical reason, viz. "counsel," "judgment" about what has been counselled, and "command" [*Cf. Question [47], Article [8]]. Now thought precedes all these acts, since it belongs also to the speculative intellect. Therefore thoughtlessness is not a special sin contained under imprudence.