Sometimes nature guards her secrets with the unbreakable grip of physical law. Sometimes the true nature of reality beckons from just beyond the horizon.

Source: "Is Our Universe the Only Universe?" TED2012. Feb. 2012. Additional Information: This quote is from physicist Brian Greene's 2012 TED Talk about the possibility of the "multiverse" -- the theory of many universes, in addition to our own. The quote means that some hidden aspects of reality (or "secrets of nature") are literally impossible to unveil, while humanity seems very close to revealing other such secrets. For example, we could discover evidence of other universes within our lifetime. Watch the full TED Talk here: Brian Greene - Is Our Universe the Only Universe?

“Is Our Universe the Only Universe?” TED2012. Feb. 2012.