Sonia said this while addressing the meeting of party general secretaries, state in-charges, state unit chiefs and others here.
A party source said that she also recalled the UPA regime's achievements in dealing with the economic slowdown between 2007 and 2009.
"She told party leaders that our government had taken the economy out of the slowdown during the economic recession," the source said.
She also recalled how during the UPA regime the Congress-led government was able to generate jobs.
Slamming the government over the economic slowdown, Sonia told the party that the BJP-led NDA government has been unable to save jobs in several sectors.
Sonia said that "the resilience and resolve of the Congress is being tested today. And we need to go to people."
This is the first meeting of Sonia with senior party leaders, a month after she was appointed the party's interim chief.
Her son and former Congress chief Rahul Gandhi stepped down from the top post taking moral responsibility for the party's loss in the Lok Sabha polls.
The party source also said that the agenda of the meeting will revolve around Gandhi Jayanti preparations, membership drive and party workers' training.