What does Jin Prem Kio Tin Hee Prabh Paayo mean?

It means whoever has loved has attained the Lord (the divine). How? Firstly the divine is not some external being, it is ones very consciousness. The Self is consciousness or Awareness Itself for the Self is the Lord of the body. Our appearences are many but our essence is one, the one Awareness. What does Oneness feel like? Love, where the veil of separateness disappears. So through Love does one get to experience Oneness and thus attain the divine through recognising ones true nature as the Infinite Unborn Consciousness.