I found this one in an article on intimate relationships and the Buddhist teaching of the “four Immeasurables” or “Divine Abidings.”
I also found it elsewhere in an expanded form: “The price of freedom is simply choosing to be; liberation is in the mind.” It’s widely attribute to the Buddha.
This is absolutely not something from the Buddhist scriptures, although I haven’t yet found the original source. I’ve seen several places where is’t presented without attribution, but accompanying an image of the Buddha. It’s possible that someone made the leap to assuming that the Buddha was therefore the author of the quote.