The big challenge is to become all that you have the possibility of becoming. You cannot believe what it does to the human spirit to maximize your human potential and stretch yourself to the limit.--Jim Rohn ( Jim Rohn's Weekly E-zine - February 11, 2003)

Challenge is the core and the mainspring of all human activity. If there's an ocean, we cross it; if there's a disease, we cure it; if there's a wrong, we right it; if there's a record, we break it; and finally, if there's a mountain, we climb it.--James Ramesy Ullman

The challenges of change are always hard. It is important that we begin to unpack those challenges that confront this nation and realize that we each have a role that requires us to change and become more responsible for shaping our own future.--Hillary Rodham Clinton

Embrace the faith that every challenge surmounted by your energy; every problem solved by your wisdom; every soul stirred by your passion; and every barrier to justice brought down by your determination will ennoble your life, inspire others, serve your country, and explode outward the boundaries of what is achievable on this earth.--Madeleine Albright 

The great and invigorating influences in American life have been the unorthodox: the people who challenge an existing institution or way of life or say and do things that make people think.--Justice William O. Douglas

The great crises of life are not, I think, necessarily those which are in themselves the hardest to bear, but those for which we are least prepared.--Mary Adams

The greatest challenge we face as human beings is acting on what we know. We don’t lack for knowing, we lack for doing.--Mark Sanborn ( Up, Down, or Sideways)

I have always grown from my problems and challenges, from the things that don't work out, that's when I've really learned.--Carol Burnett

I leave you love. I leave you hope. I leave you the challenge of developing confidence in one another. I leave you respect for the use of power. I leave you faith.--Mary McLeod Bethune

I often feel that our greatest individual challenge is to close the gap between our unflattering self-concepts and the truth of our magnificence. To see ourselves through the eyes of those who love us.--Jeff Brown (Ascending with Both Feet on the Ground: Words to Awaken Your Heart) 

If the processes don't transfer, they cannot even be called thinking. They can be called learning, memory, or habit, but not thinking. The purpose of a course on thinking is to enhance student's abilities to face new challenges and to attack novel problems confidently, rationally and productively.--Marilyn Jager Adams 

If you compared your troubles, or challenges, with those of others, you would surely find that there are those whose troubles make yours look like minor inconveniences.--Catherine Pulsifer