A : It is because they live in the knowing that they have nothing to lose by being good and kind and caring and compassionate and unselfish and giving and accepting and unconditionally loving in every instant of every moment of every circumstance or situation.
They know that they cannot lose their life for any reason or in any way, nor can they lose anything else of value to them, because nothing else is of value to them other than life itself, their very existence—which they understand is what provides them with the opportunity for the only experience they desire.