Addressing a meeting of the party's Intellectual Cell, the Delhi BJP chief said the "feel good" factor in 2004 made workers complacent leading to the party's "unexpected" defeat, and asked cadres to ensure a good turnout on April 10.
He said BJP would have formed the government in Delhi after last year's Assembly polls had it got one more vote each in half of the polling booths.
Vardhan said AAP speaks only "lies" and has humiliated all institutions from judiciary to executive and media.
"This is the first time when a strong anti-incumbency has been mixed with a strong positivity triggered among voters by (BJP prime ministerial candidate) Narendra Modi... We will win all seven seats in Delhi," he said.
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BJP candidate from New Delhi constituency Meenakshi Lekhi said the people were living in pathetic conditions in colonies near the residence of Congress vice president Rahul Gandhi and Prime Minister Manmohan Singh and it was a "shame".
Addressing the gathering, journalist and BJP spokesperson M J Akbar said India has oscillated between hope and despair since Independence and there was a groundswell of anger among youths due to current joblessness and poor economy.
"If Modi does not come to power, if BJP does not come to power, then it is not danger only for the party but also for the country... Vote not for a stable government alone but for stable India," he said.