Rt Rev Rose Hudson-Wilkin has expressed her rage and frustration at the Russian invasion and the impact it is having on Ukrainians.
Speaking to the Canterbury Diocesan Synod, Bishop Rose criticised the UK Government's response to the refugee crisis.
"I'm a great tennis fan and they were John McEnroe's favourite words when he was a player: 'You cannot be serious!' I have heard myself say that when I have listened to Government, my Government, our Government, talking about visas and applying for visas.
"People are running for their lives and we're asking them to find a place and apply? My goodness, you cannot be serious. Should we still be looking through our domestic lens about what our people will say if too many people come to our country?
"I say that because I believe passionately that this is God's world and we are here as God's children to reach out and to build relationships, to name evil when we see it."
She also called on people in the UK to provide aid and sanctuary to Ukrainian refugees: "We see on our screens the plight of the people of Ukraine and I want to tell you, that deep inside me there has been a rage.
"What is interesting to me, is that there is a real conversation, about how we receive these two million people - and I am sure it will be more - who are seeking refuge.
"People who are normal people, like you and me, who a few weeks ago were going about their normal business are now running for their lives.
"How do we respond to them? How do we open the doors and allow them in?"
According to the UN, at least three million people have fled Ukrainian since the Russian Invasion on 24th February.