What a great idea! I'd never heard of a meditation labyrinth but it sounds very relaxing indeed
As a Phd student I can totally understand why having to finish your dissertation would stress you out. It's important to remember that you're not the only one struggling, that everyone finds it hard and depressing and that you're most certainly doing just fine!! It'll all be over soon and you can move on to something new knowing you've pushed yourself and proved yourself
Best of luck and thanks for sharing the labyrinth, I will try to make one of my own!