There are two voices inside Mick Campbell's head when he attempts a challenge (the number of which he has lost count of) to take himself out of his comfort zone like he did at the weekend.
Starting on Saturday at 6am, the "proud Scottish Aussie" started at Ash Road Sporting Complex and did 10 non-stop, 80-kilometre loops of the M7 bikepath.
The 42-hour, 800-kilometre cycling challenge - the equivalent of cycling from Sydney to the Gold Coast - was to support Hands Across the Water (HATW), which raises money for disadvantaged children and their communities in Thailand. HATW instigated a virtual 800km ride where you cover the distance over June. Mr Campbell did it in one go.
Physically, the 54-year-old - who has run across the Sahara Desert and climbed the Seven Summits and describes ironmans as "not testing" - was fine. It's the mental challenge which was the battle.
"When I'm doing one of my challenges I often have a little angel on one shoulder saying, 'keep pushing, you can do this', and on the other one there's the devil saying, 'what they hell are you doing this for?' But I'm quite optimistic overall and if you bring that with you in whatever you do then things generally go your way," he said.
"I find between 3am and 4am the hardest time...but the minute the sun starts to come through it rejuvenates your body and gives you a new lease of life. The trump card is your attitude and approach."
At around 20km/h, each loop of the course took three and a half hours. He had two things motivating him. One, was raising awareness and money for a great cause. The second was personal satisfaction.
"If you have a good self-belief, if you apply and focus yourself, and you understand and are motivated by why you are doing it then you can get through most adventures," he said. "I just focused on getting through 100-metres at a time."