Big tao, little tao

I read a quote somewhere that I've pondering for a couple of weeks now. It came from one of the masters, but I can't remember where I saw it, and can only paraphrase it here:

The tao is so big, the universe can't contain it; so small, it can fit in the palm of your hand.

I've mostly been focused on the 'big' tao — the tao that is illustrated for me by those Hubble Telescope photos of the Milky Way and outlying galaxies. It's easy to be overwhelmed by the sheer scale of what's out there — almost impossible, in fact, to not be overwhelmed — and to just throw one's hands up and say, "It's too big. I can't grasp it. I can't relate to it. Why try to do anything?"

But what about the 'little' tao — the one that's in the palm of my hand? That's something I ought to be able to get a handle on. What does it mean that this way — this undefinable, universal something, can fit in the palm of my hand?

I have to think more about this.