“One is too small a number to achieve greatness.”

Frag. B 1, quoted in John Burnet's Early Greek Philosophy, (1920), Chapter 6.

Regarding coronavirus. Posed question: "Mr. President, have you been briefed that up to 100 million Americans would ultimately be exposed to the virus?"

Briefing at the White House https://www.whitehouse.gov/briefings-statements/remarks-president-trump-meeting-republican-senators-2/ ()
2020s, 2020, March

Source: The 15 Invaluable Laws of Growth: Live Them and Reach Your Potential

1850s, Address before the Wisconsin State Agricultural Society (1859)
Context: The old general rule was that educated people did not perform manual labor. They managed to eat their bread, leaving the toil of producing it to the uneducated. This was not an insupportable evil to the working bees, so long as the class of drones remained very small. But now, especially in these free States, nearly all are educated — quite too nearly all, to leave the labor of the uneducated, in any wise adequate to the support of the whole. It follows from this that henceforth educated people must labor. Otherwise, education itself would become a positive and intolerable evil. No country can sustain, in idleness, more than a small percentage of its numbers. The great majority must labor at something productive.

Source: 1930s, In Praise of Idleness and Other Essays (1935), Ch. 8: Western Civilisation

The third and fourth sentences are a paraphrase of a sentence by G. K. Chesterton: "I do not believe in a fate that falls on men however they act; but I do believe in a fate that falls on them unless they act." Generally Speaking, "On Holland' (1928).
1980s, First term of office (1981–1985), First Inaugural address (1981)
Context: It is time for us to realize that we're too great a nation to limit ourselves to small dreams. We're not, as some would have us believe, doomed to an inevitable decline. I do not believe in a fate that will fall on us no matter what we do. I do believe in a fate that will fall on us if we do nothing. So, with all the creative energy at our command, let us begin an era of national renewal. Let us renew our determination, our courage, and our strength. And let us renew our faith and our hope. We have every right to dream heroic dreams. Those who say that we're in a time when there are no heroes, they just don't know where to look.

Quoted in Food as people's right, 4 January 2012, 25 November 2013, The Hindu http://www.thehindu.com/opinion/lead/food-as-peoples-right/article2769348.ece,