Example opening
Dad,
Some kinds of gratitude take time to grow into words.
I think that is true for me.
There are things you gave me that I only fully understand now: steadiness, patience, responsibility, and the quiet kind of care that does not ask to be noticed. You were there in ways that felt practical at the time, but meant much more than I knew.
Thank you for what you taught me without turning everything into a lesson. Thank you for the help you offered so naturally that it was easy to miss how constant it was. Thank you for being someone I could rely on, even in moments when I did not know how to say that out loud.
A lot of what I trust in life was built from the example of your presence.
So this is a simple thank-you, but a very real one.
Thank you for more than I ever said clearly enough.
Marcus