The newly-promoted side picked up their second point of the campaign with a goalless draw against Crystal Palace this afternoon.
The Clarets manager told BBC Sport: "You can see the belief is growing. We just missed that extra quality in the top third but that will come.
"If you are brave enough to take a penalty you have to be brave enough to score and to miss. Scotty Arnfield was brave enough and I don't have a problem with that."
Julian Speroni saved Arfield's spot kick in the final moments of the match to ensure that the sides finished level.