The 34-year-old Portuguese tactician was handed a life-line back into English football following a dismal eight-month spell with Spurs' London rivals Chelsea last season, before he was sacked in March.
However, when Spurs failed to win any of their opening three games the knives were quickly sharpening as a section of the Tottenham fans booed the players off following home draws against Norwich and West Brom.
But three successive wins, including last weekend's first victory at Manchester United since 1989, have now given Villas-Boas renewed confidence in himself.
"I have never doubted my abilities, I always trusted them," he said.
"It's funny how things change so dramatically. The Premier League is completely unpredictable. We started the season (badly). We are now fifth from the top."
Spurs are looking to make it four league wins on the bounce in home games against Aston Villa on Sunday and then Chelsea with Villas-Boas calling for focus following the lacklustre 1-1 Europa League draw at Panathinaikos on Thursday.
"We have won three (league) games on the trot. Now we go into two difficult home games," he added.
"We understand we made history by winning at Old Trafford, but if we want to take that step forward, we have to win the next couple of fixtures."