Unalloyed love for God means love that is not tinged by desire for material benefit, for mere philosophical understanding, nor for fruitive results. Unalloyed love is to know, "God is great, I am His part and parcel, and therefore He is my supreme lovable object." This consciousness is the highest perfection of human life and the ultimate aim of all methods of self-realization. If one reaches this point — God is my only beloved, Krsna is the only lovable object — then one's life is perfect. And when one tastes that transcendental relationship with Krsna, then one feels real happiness.

(From The Science of Self-realization 8b: The Highest Love)