Whether the third beatitude, "Blessed are they that mourn," etc. corresponds to the gift of knowledge?

❌ Objection 1 : It would seem that the third beatitude, "Blessed are they that mourn," does not correspond to the gift of knowledge. For, even as evil is the cause of sorrow and grief, so is good the cause of joy. Now knowledge brings good to light rather than evil, since the latter is known through evil: for "the straight line rules both itself and the crooked line" (De Anima i, 5). Therefore the aforesaid beatitude does not suitably correspond to the gift of knowledge.

❌ Objection 2 : Further, consideration of truth is an act of knowledge. Now there is no sorrow in the consideration of truth; rather is there joy, since it is written (Wis. 8:16): "Her conversation hath no bitterness, nor her company any tediousness, but joy and gladness." Therefore the aforesaid beatitude does not suitably correspond with the gift of knowledge.

❌ Objection 3 : Further, the gift of knowledge consists in speculation, before operation. Now, in so far as it consists in speculation, sorrow does not correspond to it, since "the speculative intellect is not concerned about things to be sought or avoided" (De Anima iii, 9). Therefore the aforesaid beatitude is not suitably reckoned to correspond with the gift of knowledge.