The greatest danger for most of us is not that our aim is too high and we miss it, but that it is too low and we reach it.
Source, in full
Attributed without citation in Ken Robinson, The Element (2009), p. 260. Widely attributed to Michelangelo since the late 1990s, this adage has not been found before 1980 when it appeared without attribution in E. C. McKenzie, Mac's giant book of quips & quotes.
Notes from Wikiquote
Similar to "Most people fail in life not because they aim too high and miss, but because they aim too low and hit.” which has been attributed to Les Brown. | Similar to "The greatest danger for most of us lies not in setting our aim too high and falling short; but in setting our aim too low, and achieving our mark” appearing in the title sequence of The Martian (film) see also at the end of the clip.