The Ivorian put in a string of impressive performances up front for Garry Monk's site of late and has 19 goals to his name in all competitions this season.
Having been without last season's talisman, Michu, for much of 2013-14 due to an ankle problem, Bony's goals have helped to secure a win over rivals Cardiff City, while his work-rate was in evidence as the Swans held Serie A high-flyers Napoli to a goalless draw in the Europa League.
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|11/1||Swansea City are 11/1 with PaddyPower to beat Napoli with Wilfried Bony scoring at any time|
"I think confidence is a big thing, particularly for strikers, and you can see the confidence he is playing with.
"We love him and he is involved in the build-up a lot more now. The main thing is confidence and he's getting that from finishing his chances."
Bony is expected to lead the line for Monk's side in the second leg of the Napoli tie at the Stadio San Paolo on Thursday, with the Welsh side targeting a valuable away goal, but, even if he fails to find the net, Williams feels that the forward's recent displays could lead to opportunities for team-mates.
"It is not just his goals," the defender added. "During the last few weeks I have really felt sorry for the opposition defenders as he has been unplayable.
"He's got to be the strongest player in the league but he uses his strength and body well. His strength is obvious but his touch and his awareness have been excellent too. He is on fire at the moment."