The 73-year-old "Piku" actor said even though the viewers always make the artist nervous, but at the same time give the boost when one is going through lows.
"Audiences terrify. They really do. A prayer before their meeting goes up on each occasion... What they say , what they react with, what they laugh and scream at, what they shall reject and what accept... All...
"They are though our adrenalin, our space that needs to be filled when we are in need... That boost to our self and our presence when it is up for questioning... Everything," Bachchan wrote on his blog.
The actor will next be seen in Bejoy Nambiar's "Wazir".
Also starring Farhan Akhtar, Niel Nitin Mukesh, Aditi Rao Hydari and John Abraham, the film will release on January 8, 2016.