Comforting, truth, sorrow, compassion

It is interesting to note that "the Comforter", in all its references, speaks gospel truth. Try doing a scripture search for it. For example, the most well known one:
"And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever;

• • •

But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you"

What is this connection between truth and comforting?

Some truth brings sorrow. When you state a truth that brings sorrow to you or others is that truth simply incomplete truth; truth that sees only part of the whole, missing a part that is unknowable or imperceptible or neglected now, but may be clear at another time?

What is the relationship between truth, sorrow and comforting? Can I assume that each sorrow that devastates is an incomplete truth, needing full attention, but not complete in itself?

And if that is the case, then there looms the obvious, egregious error of discounting another's sorrow or glibly reciting general platitudinous truths in response to it, something we often do in our attempts to avoid feeling its pain.

Compassion, truth, comforting, sorrow. All together. It requires more than most of us feel inclined to fully bear all at the same time. But perhaps they are inextricably entwined when fully experienced.

"He was a man of sorrows and acquainted with grief."