Love is a condition in which the happiness of another person is essential to your own. – Robert Heinlein, Author dhavalvadi 4 years ago Love is a condition in which the happiness of another person is essential to your own. Robert Heinlein Author 1 Love is a condition in which the happiness of another person is essential to your own. – Robert Heinlein, Author Love is a condition in which the happiness of another person is essential to your own. – Robert Heinlein, Author