This song from The Train holds a very special place in my heart. Although I like every line, every word of it, and I've come to appreciate the philosophy behind it a lot, I just felt like putting down these lines from the song here...
Kis kadar tez raftaar thi zindagi
keh kahein har taraf, thi khushi hi khushi
Maine jis din kahin pyaar ki baat ki
Ruk gayi thi achaanak woh behti nadi