The former heavyweight world champion hasn't fought since tragically losing two close friends in a car accident in Nigeria last December but insists that he will be better than ever when he returns to take on Kristian Prenga in Riyadh next month.
Joshua told Sky Sports: "I feel solid. This is where I want to be. I'm very grateful for this opportunity. It's nice doing what I love.
"Life throws many obstacles at us. I stand before you now as a boxer, but I've got things happening in my life. I think this is the right place for me to be.
"I'm building myself up to be stronger than I've ever been because I know I am - not only physically, because that's natural, but mentally. I've realised I'm a lot stronger than I ever thought I was.
"I got into boxing to reshape my mind and identity, to make me a better person. It's doing the same for me now. It's reshaping my life and giving me purpose.
"It's funny because the same reason I got into boxing is the same way it's helping me now. Boxing was never just about being a champion, it's about the championship mentality."
The Prenga bout will serve as a tune-up for Joshua before a long-awaited fight with Tyson Fury takes place later this year and he explained that the training camp for the fight - in which he has worked with legendary heavyweight world champion Oleksandr Usyk - will be particularly important.
The British fighter said: "I want to get some combinations going. I want to get some power punches going.
"What I'd like to see is my eyes focused on his body language changing, being able to break him down and then execute what I know I can do. I can punch really hard, and when I do that it will give me confidence going into the Fury fight.
"Confidence comes from your training. The fight is only an execution of that, so it's not just the fight that gives me confidence.
"It's getting through these seven weeks because every fighter knows it's hard. You've got sparring partners - I've got four or five good guys waiting for me - so it's not just the fight.
"I know what I'm going to do in the fight, but can I do it every day in the gym? Getting through this training camp will be the real reason I'm victorious on July 25 because of the way I prepare."
