Countries that "mistreated Ukraine" will be held to account after the war ends, Ukraine's Foreign Minister Dmytro Kuleba has warned.
In a BBC interview he said the choice every nation made following Russia's full-scale invasion will be "taken into account in building future relations".
In a wide-ranging interview, Mr Kuleba also discussed how he believes the war will end, the role of China in the war, and his disappointment that Pope Francis has yet to visit his country in war time.
Although Ukraine has received military and economic support from Western powers since Russia's invasion, many countries in Africa, Asia and South America have stayed on the sidelines.
Some are historically sympathetic to Russia, some are concerned about the economic costs of the war, and others believe the West is prolonging the fighting unnecessarily.
But Mr Kuleba made clear that countries which failed to support Ukraine now - those, he said, which had "misbehaved in the course of this war and mistreated Ukraine", would pay a price in the future.
Ukraine may well be dependent on Western aid and military support in the medium to long term and so its diplomatic disapproval may not worry some countries. But in peacetime Ukraine's huge grain exports give it substantial economic leverage, particularly in parts of the developing world.
"If anyone in the world thinks that the way this or that country behaved - or treated Ukraine at the darkest moment of its history - will not be taken into account in building future relations, these people just don't know how diplomacy works," he said.
"War is a time when you have to make a choice. And every choice has been recorded."
And that involves building the strongest possible coalition of support, an alliance that he feels does not include the Pope. Mr Kuleba said it was not for him but for God to judge the Holy Father but, he said: "We deeply regret that the Pope has not found an opportunity to visit Ukraine since the beginning of the war."
China, too, has thus far resisted Ukraine's lobbying for a meeting between China's President Xi Jinping and Ukraine's President Volodymyr Zelensky, even though Beijing confirmed on Friday that China's leader is to visit Moscow next week.
Mr Kuleba said his president was ready for a telephone conversation with Mr Xi and added: "I don't think China has reached the moment now… when it's ready to arm Russia."
And, he says, Ukraine has one crucial factor on its side: "Historically, Ukraine was unfairly under-appreciated, and I regret it took a bloodshed and a devastating war for the world to realise how cool we are.
"And we will always be cool. But it just took you too much time to realise that."
