Half the good wishes in the world are never delivered. Somebody thinks about a friend in hospital on the way to work, warmly and at length, and the friend never learns it happened.
Holding another person in mind does something to the person doing it. It keeps them soft, keeps them from drifting off. But it becomes a different object entirely once it arrives — six words in a message on a Wednesday, no question attached, nothing required in reply.
For whoever is in the difficult month, the gap between being thought about and being told you were thought about is the gap between weather and a hand.