Famous quotes containing the words formula and/or challenge:
“I feel like a white granular mass of amorphous crystals—my formula appears to be isomeric with Spasmotoxin. My aurochloride precipitates into beautiful prismatic needles. My Platinochloride develops octohedron crystals,—with a fine blue florescence. My physiological action is not indifferent. One millionth of a grain injected under the skin of a frog produced instantaneous death accompanied by an orange blossom odor.”
—Lafcadio Hearn (1850–1904)
“The very best reason parents are so special . . . is because we are the holders of a priceless gift, a gift we received from countless generations we never knew, a gift that only we now possess and only we can give to our children. That unique gift, of course, is the gift of ourselves. Whatever we can do to give that gift, and to help others receive it, is worth the challenge of all our human endeavor.”
—Fred Rogers (20th century)