This imortal sung sung b Kishore Kumar is from the film Safar starring Rajesh Khanna and Sharmila Tagore. The music is scored by Kalyanji Anandji and lyrics penned by Indivar. This flm became a hit in the 70s and the songs were liked by one and all. This is one of my favorites and I keep singing this whenever I get time....... so much of meaning contained in this little song!!