Rodgers loves working with the controversial Uruguayan.
"Over the years, people get called 'hard men'," he told the Mail on Sunday. "They're normally centre-halves or midfield players.
"But Suarez is a hard man. Don't underestimate him; he's a hard man, even though he's a striker. He gets battered every game, he gets kicked. He's probably the toughest player mentally I've ever come across in my life. He's the most relentless in his desires.
"We've seen it in all his time here. He's maturing as well. There's not much rattles him and plenty that inspires him.
"The greatest thing is that it's about his football now. It was a real difficult period for him in the summer. It took a lot of work to convince him that the club's going forward.
"We won a big battle in keeping him here. But he's at his happiest now. He became a father for the second time, he's 27, he's got a World Cup to look forward to. I just think this is a club that suits him."
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