With the political climate process sputtering on well into its 3rd decade as emissions rise remorselessly, activists have stepped up grassroots campaigns of civil disobedience to speed up action.
"You can be proud", Mr Kurtyka said.
A statement by UN Secretary-General António Guterres, who left the talks on Thursday, stressed the need for more work.
Officials from around the world are still working to agree on the fine print of the Paris climate accord after two weeks of talks, even as workers dismantle sections of the conferenced venue around them.
"It was never going to be great, not least because the U.S. is playing a laggard role, but I think we can get a decent outcome, if it's framed in the right way", said Alden Meyer from the Union of Concerned Scientists.
Earlier in the day, Gebru Jember Endalew, chair of the Least Developed Countries negotiating group, said delegates had reached a "landing zone" of compromise after negotiations sailed past their Friday deadline and deep into the weekend.
"It is a bit hard to compromise when there are 190-plus countries".
At their heart, negotiations were quesitons as to how each nation funds action to mitigate and adapt to climate change, as well as how those actions are reported.
Many encouraging announcements, especially on financial commitments for climate action, were made: Germany and Norway pledged that they would double their contributions to the Green Climate Fund, established to enable developing countries to act; the World Bank also announced it would increase its commitment to climate action after 2021 to $200 billion; the climate Adaptation Fund received a total of $129 million.
"Katowice has shown once more the resilience of the Paris Agreement - our solid roadmap for climate action", she said. In Paris, we said what our goals were and here, we agreed on the rules for getting there - and with the whole world!
Although a text of the package of rules has been published which shows many points have been settled, there was a stand-off over the accounting rules for future carbon permit schemes.
Nations on Sunday struck a deal to breathe life into the landmark 2015 Paris climate treaty in the mining city of Katowice, Poland.
Some observers cast Brazil as the villain, with several sources accusing it of seeking to muddy the date by which the provisions should enter into force.
One of the key components of the "Katowice package" is a detailed transparency framework, meant to promote trust among nations regarding the fact that they are all doing their part in addressing climate change.
Alarmed by efforts to include this in the final text of the meeting, the oil-exporting nations of the US, Russia, Saudi Arabia and Kuwait blocked an endorsement of the IPCC report mid-way through this month's talks.
Almost 200 countries overcame political divisions late on Saturday to agree on rules for implementing a landmark global climate deal, but critics say it is not ambitious enough to prevent the unsafe effects of global warming.
"We must make sure that the earth remains inhabitable", Ms Schulze said.