On the outside, my holiday cards say:
We shall find
peace.
We shall hear
angels.
We shall see the sky sparkling with
diamonds!
(Chekhov)
On the inside, it says "Happy Holidays"
This card is very much me, and my T will totally get that. There is nothing not genuine about the sentiment.

What is most important, though, is the personal message I wrote inside, not the printed message. If it is uncomfortable to send a card with a printed message inside, one can buy a card that is blank inside and not have to worry about that.
What I really like is that I rather easily sent the card to T and didn't angst over it. The act was very simple and I didn't worry he wouldn't like the card, think it was inappropriate or crossing a boundary, that it would make me too vulnerable, that he would reject me, think the card was stupid, throw it in the trash, or whatever. This was just very normal and easy for me! I think I am starting to be normal again!