"Chaahat Ka Hai Harasu Asar" means???
 

Can any one help me understand the meaning of “Chaahat Ka Hai Harasu Asar” in this hindi song of film “Asli Naqli”???
Music Director: Shankar Jaikishan
Lyrics: Shailendra
Singer: Lata Mangeshkar
Lyrics:
... ( Tera Mera Pyaar Amar, Phir Kyon Mujhako Lagata Hai Dar )-2
Mere Jivan Saathi Bata, Kyon Dil Dhadake Rah-Rah Kar

Kya Kaha Hai Chaand Ne, Jisako Sunke Chaandani
Har Lahar Pe Jhum Ke, Kyon Ye Naachane Lagi

Chaahat Ka Hai Harasu Asar, Phir Kyon Mujh Ko Lagata Hai Dar
Tera Mera Pyaar Amar, Phir Kyon Mujhako Lagata Hai Dar

Kah Raha Hai Mera Dil, Ab Ye Raat Na Dhale
Khushiyon Ka Ye Silasila, Aise Hi Chala Chale
Tujhako Dekhun, Dekhun Jidhar, Phir Kyon Mujh Ko Lagata Hai Dar
Tera Mera Pyaar Amar, Phir Kyon Mujhako Lagata Hai Dar
Hai Shabaab Par Umang, Har Khushi Javaan Hai
Meri Donon Baahon Men, Jaise Aasmaan Hai
Chalati Hun Main Taaron Par, Phir Kyon Mujh Ko Lagata Hai Dar
Tera Mera Pyaar Amar, Phir Kyon Mujhako Lagata Hai Dar

Watch the song http://www.youtube.com/watch?v=BV0-rrdPJKw

harsu ka matlab hai...................everywhere.................. ....:)