Brazil-born Cacau, who became a German citizen last year, scored twice in Germany's 3-0 friendly victory against Malta on Thursday that kicked off their preparations for the World Cup starting in June.
They were the VfB Stuttgart striker's first goals for the national team on his sixth appearance but confirmed he is in superb shape going into the tournament, having scored 13 league goals.
"It is quite unbelievable what has happened to me in the past few years," the 29-year-old told reporters after the match in Aachen.
"Nine years ago I was in the ninth league with Turk Gucu Munich. Now I play for the national team. The World Cup participation is the crowing moment. Germany has adopted me in a way," he said
"I am just happy the coach trusts my strengths. I am not a striker who waits up front. I move and I like to come out of the defence," Cacau said.
"It is no accident that he is in the team," Low told reporters. "He has these qualities that you do not find in many strikers. He picks up the ball in midfield, has speed, always goes forward," Loew said.
