Tiwari's outburst came a day after he was served a show cause notice by the BJP National Discipline Committee for allegedly indulging in "anti-party activities".
He said he will "appropriately" reply to the notice.
"I have not received the copy of the notice yet, but I will reply in a manner that those who served the notice will remember to whom they are taking on," he said to his supporters, who gave him a round of applause, at his residence.
"Those complaining about my indiscipline don't know what discipline is all about. If you are all with me then we don't have to fear anything," he told the supporters.
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Yesterday, Chairman of the BJP's National Discipline Committee Ganeshi Lal had issued the notice to Tiwari citing "indiscipline" on the latter's part.
The committee, which said that they received the report card of Tiwari from BJP state president Ashok Parnami, accused him of indulging in activities and giving statements against the party, remaining absent from the party meetings, sharing platforms with the members of the opposition parties and making efforts to establish a political party.
The committee sought his reply in 10 days or "else face action for the indiscipline".
Tiwari is a senior party leader and an old RSS hand.
He is the most vocal among a group of known Chief Minister Vasundhara Raje baiters in the state.
Over the last two years, Tiwari has been prepping his organisation 'Deen Dayal Vahini' as a force against Raje and the state leadership.