"We look at the players around the world," Arnold said. "When I went to Hibs to see Mark Milligan and Jamie MacLaren, and I spent one day watching him, it was nothing special."
"To be honest, I did not have to work too hard to convince him to play in Australia, he was glad to do it, and so fit into the group."
Who knew the answer to the Australian shooting difficulties would be the son of the Balmain truck driver who is waiting for the Aberdeen world to be discovered? The truth is that Boyle, who started ahead with Tomi Juric and Awer Mabile in a completely new three front, was unhappy with the hattrick.
Aziz Behich's cross made it just fine for 4 minutes. Boyle waited on the back pillar and hit the target from a difficult angle with a tasty first choice, but somehow he got between Lebanon's guardian Mehdi Kahlila.
For another short moment he made another whip and then in Jurica twice in two minutes. Juric's shot for the first time was out of the target, but would definitely postpone the second if it was not the last attack hit by Joan Oumari.
Boyle eventually broke his long-range international javelin in the 19th minute, bouncing off Oumari. He reached into the air, pumped his fist and rocked his teammates when he was celebrating – but it was even more.
41 minutes into the match, Boyle were awarded a penalty that Milos Degenek blasted a header to Aaron Mooy after a bit of a scramble, but the ball glanced harmlessly off the crossbar. The ball fell directly to his feet, and he put it down with joy.
Boyle was not done yet. Just as the match seemed to have fallen into recession, star Hibernian FC nurtured her again by putting it on a plate for Mathew Leckie, who was on the pitch just minutes.
Boyle's cross from the right side was perfectly measured for Leckie, who quickly extended his lead to three goals in 68 minutes.
It was a promising thing for Arnold, whose plans for the January Asian Cup seem to be directly clicked into place. With Lebanon, they were rarely harassed, and in the last third they were much more efficient than the Saturday night draw against South Korea in which Boyle debuted.
They went just to sack the fourth goal, with the substitute Andrew Nabout – proud Australian Lebanese – struck woodwork in the dying stages. But for a huge piece of 33,268 people, it was just a shot at the evening's main event: Cahill's farewell.
The biggest Socceroo of all time came into the battle last 82 minutes and replaced Aaron Mooya with a huge applause. When he touched the ball, he jumped again. The target he so badly wanted to cover up in the evening did not come, but he dressed from a playful field dressed in Lebanese colors.
Cahill can be pleased to return to the international match with a biography that will never improve. They have long been afraid Socceroos will deal with him. Maybe finally there is enough evidence to suggest they can.
"I have a really strong belief there will be something special," Arnold said.
Vince is a sports reporter for the Sydney Morning Herald.