Nice tatts, very philosophical.
Do we know ourselves?

Always a very good question, isn't it...?

Yeah it is.

So when you mutate into some thing horrid, we.ll know its you by the tatts on your uhhhh protuberances.

But of course. :p

What language are those written in?

...Sorry; in terms of linguistics, I'm still a bit of a novice...

They're Latin. The left arm reads "Nosce te Ipsum" meaning "Know thyself."
The right arm reads "Memento Mori" meaning "Remember you will die."

Those do seem fairly interesting, and also kind of dark...

It is and it isn't. It's more an acknowledgement of the inevitable. It will happen. Sooner, or...preferably...later. You can ignore it, you can deny it, you can fear it...or you can accept it. But once you accept it, that's when you can truly live, knowing every day is a gift and a blessing, and that it counts.

Thoughtful and well done! Congratulations.

Thank you very much! :)

Remeber that you are human, and you will die someday.

I love that phrase.