Simon Moore says the Blades must remain upbeat despite Friday's loss to Bristol City at Bramall Lane.
Speaking after Aden Flint's stoppage-time winner for the Robins, cruelly denied ten-man United at least a share of the spoils, the recalled goalkeeper remarked:
"We were the better team, especially in the first-half when we were excellent, but it shows how far we've come that we're disappointed having lost to an established Championship side.
"Of course it hurts even more losing in the last minute and we didn't deserve to leave the game with nothing, but it's games like this and ones previously where you learn a lot about yourself and the players round you and it will make us even stronger going forward."
Moore added: "There is a big step up from League One where you could get away with certain things, but we've shown we can dominate games and create so many chances, it's just the opposition have the ability to be clinical.
"We'll learn from these moments and we'll continue to progress and get to where we want to be.
"We've shown already this season how good we are, how good we've been and how good we will be in the future."