Ben Arfa missed the start of the season after suffering a and ankle injury on top of the horrific double leg break from a Nigel De Jong tackle last season which ruled him out for nine months.
Since then, the Frenchman has made tentative steps towards regaining his first team spot from Gabriel Obertan.
The former Marseille man capped off a fine performance in the FA Cup last week against Blackburn with a Goal of the Season contender.
With the score at 1-1, the Magpies seemingly heading for a replay but Ben Arfa brought the ball from the halfway line and beat six defenders before slotting the ball into the net.
Best believes that the sensational goal highlighted the confidence that Ben Arfa regained from being out for so long and will benefit the midfielder in the coming matches.
The Newcastle striker told his club's official website: "It's a matter of Hatem believing in himelf, as well as people getting on him and keeping him in a happy mood,
"He's a funny character, but a lovely guy and I get on very well with him. It is sometimes a matter of confidence within yourself, and it came out against Blackburn last weekend.
"That will help him progress and show his talent even more this season."
Newcastle will look to keep pace with the leading group in the Premier League when they face QPR this Sunday.