Dharma and eternity or amaratva
Dharma is that which sustains ones existance - So according to Gaudiya Vaisnava school of thought Krishna prema is the dharma of every living being. Why do you think advanced devotees can sustain without food water etc? Becasue having achieved Krishna prema and saturated with it, Prem sustains them - Prem is the thing which really sustains us - others are artificial sustenence. During sadhaka stage it is important to nourish the body with food etc.....So our sadhana to attain prem maintains us Death is absence of sustenence - an identity which is illusory and artificial has to die and decay - only the real identity will be sustained by the universe - One can sustain for eternity and become timless by achieving Krishna prema