"I don't know how many Welsh internationals - 10, 11 or 12 - the Ospreys had who just came off the Six Nations and we've got a nil.
"This side's in good shape. It's got good spirit to defend and work as hard as they did in a game where we didn't have much possession or as much cutting edge.
"But we made sure we won the game and that stands you in good stead. It doesn't guarantee you anything. It doesn't mean you'll roll all the way and get silverware, but in means you're in good health.
"And if you can keep working that hard, you may get something at the end of it."
Ospreys coach bemoans lack of cutting edge
Holley added: "It's not often the Ospreys get nilled. Full credit to Gloucester - they did a job on us at the breakdown and I thought they defended really, really well."
The Ospreys head coach said Wales' Six Nations disappointment could not be used as an excuse for his star-studded side's failure and they would now target Magners League and Heineken Cup success.
"Look, we can't use that as an excuse," said Holley. "I think we played enough rugby to perhaps win the game and weren't clinical enough.
Morgan hails 'fantastic' Gloucester
"So that's very disappointing. We relinquished the title, which was very disappointing, but now we've got two big games in two weeks and we've got to dust ourselves off.
"We missed a couple of early penalties so I think the boys felt the game was going our way.
"We had a lot of momentum, a lot of territory and they really wanted to get a score on the board so at half-time we still felt the game was in our favour."
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