On The Way To Krsna  (Paperpack, His Divine Grace A.C. Bhaktivedanta Swami Prabhupada)

We are all searching after happiness, but few of us know that the basis of real happiness is something eternal, beyond temporary material things. We are trying to get happiness through this temporary material body; therefore we are frustrated. The spirit soul is eternal, and the Supreme Lord is eternal; therefore reciprocation of their loving exchanges is eternal. By Krsna consciousness, we can relish spiritual happiness as we make spiritual progress.