Which two interconnected concepts does Carson McCullers develop in this excerpt from "Loneliness . . . an American Malady"?

Love is affirmation; it motivates the yes responses and the sense of wider communication. Love casts out fear, and in the security of this togetherness we find contentment, courage. We no longer fear the age-old haunting questions: "Who am I?" Why am I?" "Where am I going?" —and having cast out fear, we can be honest and charitable.

For fear is a primary source of evil. And when the question "Who am I?" recurs and is unanswered, then fear and frustration project a negative attitude. The bewildered soul can answer only: "Since I do not understand 'Who I am,' I only know what I am not." The corollary of this emotional incertitude is snobbism, intolerance and racial hate.