Gratitude is first of all, it is the only way to appreciate life and everything that is in it.
There is no other way to appreciate.
When you thank a person, you let him know that he was useful to you, and you appreciated what he did for you.
When you thank fate, the Universe, God, good luck for something, you make it clear to the world that all this is dear to you.

The principle is simple: when you value what you have, it speaks of your maturity, of your responsibility.
Usually such a person gets even more over time.
And those who do not value receive nothing.
This mechanism is governed by the law of equilibrium of the Universe.

I send you and your family a harvest of blessings this Thanksgiving.