Guide is is one of my favourite movies not because of any other reason but the music. I think SD Burman did a great job. I must have listened to the Guide - Jewel Thief cassette at least three hundred times during my teenage years, but I never realised that Kya se kyaa ho gayaa and Mose Chhal kiye jaaye are the same tune in two different voices. But then Lata and Rafi were great artistes and Shailendra was a great lyricist too. Enough raving about the music, come to the line featured here. This comes during the climax scene when Raju Guide (Dev Anand) is dying and he has a vision of his spirit (aatma) which goes into a Gitaesque gyaan session about how the spirit cannot be killed and is forever. But I really like the lines and I am going to repeat them verbatim
"maut ek Khayaal hai, jaise zindagi ek Khayaal hai. na sukh hai na dukh hai. na deen hai na duniya. na insaan na bhagwaan. sirf main . main hoon. main. main. sirf main"
"मौत एक ख़याल है जैसे ज़िन्दगी एक ख़याल है. न सुख है ना दुख है, न दीन है न दुनिया, न इंसान न भगवान. सिर्फ़ मैं. मैं हूं. मैं. मैं. सिर्फ़ मैं"
Now this is not a line that can be used unless you are dying and you have had a vision of your spirit. But the lines are powerful and can be used in a different way. We all live in a selfish world, where most of our actions are oriented towards pleasing one's own self. But at times you feel guilty about it. Selfishness is not a much appreciated quality - though we are all selfish. There has been no Gordon Gecko who has come and said something like 'Selfishness is good'. So whenever you need to 'justify' a seemingly selfish action. Use this line. For good measure use the entire dialogue. It works for me. Self is the only true god - worthy of worshipping.
"सिर्फ़ मैं हूं"