The love and happiness that Ashok Mehra and his wife Purnima share is reflected in this song as it talks about the depth of feeling they have for each other. Without one the other would lose all will to live as each one is the reason of the other's life. Shortly after this, she dies at childbirth.

'Agar Tum Na Hote' is the story of a wealthy businessman Ashok Mehra (Rajesh Khanna). His wife Purnima Mehra (Rekha) who is expecting, dies after giving birth to a daughter, Mini (Baby Shabana). Ashok Mehra hires a photographer, Raj Bedi (Raj Babbar) to employ a model for advertising his cosmetic product, who employs Radha (Rekha). She incidentally bears striking resemblance to Ashok's late wife. Bedi falls in love with her and marries her. But then tragedy strikes when he is struck by paralysis and Radha has to work for Ashok as a governess to bring up his daughter. Ashok however does not know that Radha is married and gets slowly attached to her.
Song Name - Agar Tum Na Hote
Movie - Agar Tum Na Hote
Singer - Lata Mangeshkar
Lyrics - Gulshan Bawra
Music Composer - R. D. Burman
Director - Lekh Tandon
Studio - Shivam Chitrya
Producer - Rajeev Kumar, Vimal Kumar
Music Label - Sony Music India-550 Music
© 1983 Sony Music Entertainment India Pvt. Ltd.
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