I have to say that I really liked this explanation. When I think of boundaries, I always visualize a stone fence (like the ones you see in Vermont or New England). It's something that draws a line with finality; it's unmovable and often reinforced. A limit is a bit different. It's a bit more fluid. For example: "Would you like some ice tea?" "Sure, but just to here." But next time I have some tea, I might indicate that I can handle a full glass. I know it's still drawing a "line in the sand" but I like that it can change and move. I also think it demonstrates that human's limits can change over time; it's a good thing for people who have difficulties with limits to learn. As a person who tends to think in black and white terms, it's nice to know that someone I have learned to trust can show me how to live a bit more in the gray zone as well as demonstrate good self-care. Thanks for giving this example!