Robert Heinlein, Stranger in a Srange Land Browse All Authors Famous Quotes by Robert Heinlein, Stranger in a Srange Land Love is the condition in which the happiness of another person is essential to your own.... Jealousy is a disease, love is a healthy condition. The immature mind often mistakes one for the other, or assumes that the greater the love the greater the jealousy. Robert Heinlein, Stranger in a Srange Land
