To sincerely challenge someone is the most loving thing you can do.
The best teachers are not the ones who simply explain the material, but rather the ones who challenge their students to explain it. The best coaches are the ones who refuse to accept anything less than outstanding performance.
The more challenges we have, the more we learn, and the more we grow. Challenge inspires us to innovation. It forces us to look at things in a different way. It motivates us to get starteed. It helps us to persevere when the going gets rough. It makes us strong and gives us the confidence to attempt great things.
Make challenge a part of your experience every day. Challenge yourself. A big enough challenge will force you to be the best you can be. It will bring out strengths and abilities you never knew you had.
Life at its best is a series of challenges. The strength to tackle the big challenges comes from success at overcoming the easy ones. Take on challenges and you will bring yourself to life.