My nature is that I have to excite myself with a big challenge. Garry Kasparov
Clearly a big challenge for Christianity is how to remain in contact with the millions of people who look for God but do not come to Church. Timothy Radcliffe
Don't just accept the world you inherit today. Don't just accept the status quo. No big challenge has ever been solved, and no lasting improvement has ever been achieved, unless people dare to try something different. Dare to think different. Tim Cook
I'm used to people not paying me a whole lot of attention and underestimating me and, frankly, for me a big challenge is to have people believe that I can be the president of the United States. Carol Moseley Braun
In Liberia, the big challenge that remains for us is job creation. We want young people to work or go to school. That is our main preoccupation right now. Ellen Johnson Sirleaf
Trying to lead an interesting life, a fruitful life, is a big challenge. John Patrick Shanley