James E. Homans, editor, The Cyclopædia of American Biography… (1918)
“ Rubin is also a dreamer — not a visionary — the type of man who sees what the world needs to make it a better place for humanity, and then proceeds to build foundations beneath his “castles in the air.” He combines within himself those qualities so rarely found in company, for he is at once an idealist and a man of practical judgment, one who sees conditions as they are, yet, at the same time, with keen insight, has complete realization of what they should be, and can bridge the gulf with suggestions applicable to present-day problems. ”
