Speaking after Hamilton claimed the first pole position of the 2017 season, Wolff revealed how an open discussion had played a key part in Hamilton being on such strong form.
"There was a point towards the end of the year where we sat down and it felt like a reset of the relationship," said Wolff.
"So many things came out which needed to be discussed, and since then I have perceived him as being in a really good place.
"He's happy and motivated and I've seen the strongest Lewis on track that I've seen so far consistently over the weekend."
Wolff also defended new Mercedes driver Valtteri Bottas, who qualified third behind Ferrari driver Sebastian Vettel after lapping 0.293 seconds off pole position.
The Finn has said he did not hit the targets he had set for himself, but Wolff was not concerned by the performance.
"He's competitive and probably setting his own targets," said Wolff of Bottas.
"It's the right attitude, but he has really progressed well over the days he has been in the car and coming out that close in various sessions during qualifying is actually what we have hoped for.
Read the full article on eurosport.co.uk: Wolff says Hamilton stronger than ever