Krishna-bhakti is a very joyful process . It gives immense satisfaction to the practicing Bhakta . He is happy to be on the right track and what he does ( Nama-japam and service for Sri Krishna) is ETERNALLY beneficial to himself his dear ones and all others.
The purpose of human life is to serve Sri Krishna the embodiment of Supreme God . Only Sri Krishna is *Poorna* ( 100% complete God) . All other Gods are *Amsavathars* ( Partial manifestations) . Only Gita and Bhagavatham are the true authoritative Scriptural texts containing the actual essence of the Vedas. Other Puranic texts are not so accurate as they contain fiction as well .
A Bhakta who daily chants Hare Krishna Mahamantra and recites Gita or Bhagavatham, enjoys blissful self-satisfaction . These texts are literary manifestations of Bhagavan Sri Krishna Himself . It's very sound vibration purifies the chanter's heart as well as the environment. If this world is a Computer, the Vedas are it's Software. When the Vedas is corrupted , the world suffers . The present sufferings all around is due to undermining of the Vedas .
Although the non-vedic Abrahamic religions preach high ideals, what they practice is totally different. Their cultural violence such as their intolerance towards the sacred Vedas, is what destriys the peaceful existence of world .
Om Namo Bhagavate Vasudevaya!! !