More from Robert A. Heinlein
More about morality
All that is required for evil to prevail is for good men to do nothing.
Albert Einstein1879–1955Religion and Science (1930)
People/Robert A. Heinlein/Quote

Sin lies only in hurting other people unnecessarily. All other ‘sins’ are invented nonsense.
Time Enough for Love (1973).
All that is required for evil to prevail is for good men to do nothing.
Albert Einstein1879–1955Religion and Science (1930)