Ricki Lambert says the changes at Southampton in recent years are emotionally "overwhelming".
It was only a couple of years ago Saints were mid-table in League One.
"It's overwhelming if I think too much about what the club's done and where it is now, it's unbelievable," said Lambert, who believes Europe is within reach.
"If we don't get it this season we'll push even more next year, it's the ambition we have as a club set out by the chairman four years ago."
