Tree rings are said to show how old a tree is. So showing tree rings that indicates an older tree, it could either depict you as an old soul or that you are strong enough to grow. But it could definitely depend on your own story.
This is the most beautiful ying-yang tattoo idea I have ever seen . I Love this because I want a sun and moon tattoo, and a yin yang tattoo! Into ying-yangs? And massive detail and creativity? I recommend this tattoo