President Park Geun-hye has been given the green light to get busy running state affairs for the rest of her term.
The ruling Saenuri Party's unexpected landslide victory in Wednesday's by-election has given the government a mandate to rebuild itself in the wake of April's ferry disaster and pursue its stated goal of economic revival.
"The people voted for the Saenuri Party because the public felt the urgency to reform the country and revive the economy."
The governing party promised to support President Park in carrying out her national reform drives and not to use politics to divide the people.
"The Saenuri Party will denounce any form of regionalism that is deeply rooted in Korean politics and will work toward bringing about national unity."
The ruling party's new chairman Kim Moo-sung is expected to use the election win as a mandate to carry out a complete overhaul of the party.
With no elections scheduled until 2016, Kim has ample time to make his mark.
It is also possible that he may equalize the nature of the relationship between the party and the presidential house of Cheong Wa Dae.
The ruling Saenuri Party now has 158 seats in the 300-seat National Assembly.
The main opposition party has 130.
Ji Myung-kil, Arirang News.