There’s a description of Angela Merkel at her first European Council summit as German Chancellor where she walled and fenced in her opponents with facts.

As the large cavalcade of black BMWs and Mercedes rolled into the biggest walled city park in Europe today, the focus was on acquiring first hand all the facts around the complexity of the Irish border.

In the opulent confines of Farmleigh House, the German Chancellor met a number of people who fear the grim consequences that could stem from the return of a border.

They said she quietly listened and then went on to demonstrate her comprehensive knowledge of the issue.

Later when she spoke publicly her tone and demeanour oozed with determination at this the most critical juncture in the Brexit saga.

Angela Merkel said she knew the problems posed by borders having lived behind one for 34 years.

In particular, she emphasised the necessity of ensuring that they don’t return.

The quiet force she is renowned for was evident when she spoke about simply having to find a way to prevent the return of a border between here and Northern Ireland.

She choose the colloquial phrase 'where there is a will there is a way’ to make clear her commitment to help achieve this aim.

Afterwards, there was a renewed sense of optimism from the Government here.

However, observers who have watched Ms Merkel closely would say that her ability to quell anxiety in fellow politicians is among her greatest skills.

This Irish side will hope today’s visit and the sentiments expressed with gusto amount to something more solid than that.

Equally though the scale of the dilemma here remains immense.

It could potentially involve coming up with a plan that both secures the single market and avoids a hard border on the island of Ireland.

Indeed, the words of the Taoiseach, when he spoke to a group of young people today, could become particularly pertinent yet.

Leo Varadkar's first piece of advice to them was to ignore anyone who tells you that something is impossible.

"Everything is impossible, until it happens for the first time," he said.

Given the warm glow after the Farmleigh tete-a-tete the Taoiseach will surely hope this evening that he won’t have to demonstrate his faith in that creed when it comes to the border.