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I try to challenge myself as much as possible, as often as possible.

I think with challenges, you either overcome them or you fall behind and become a statistic.

For me life is a challenge. And it will be a challenge if I live to be 100 or if I get to be a trillionaire.

I don't know what my limitations are until I reach them. I look for the challenge.

It's nice to be able to do more and to always challenge myself.

Like everyone else, I have challenges.

It took me about 12 years to reach my million-word mark. The challenge now is to continue to challenge myself.

I have a tendency to pick up my own challenges. The more difficult something it is, the more I want to try it.

I like to challenge myself.

I love a challenge, and I think it's when people least expect you to do something that you often do your best.