"On Australia Day 2010, as we enter this second decade of the 21st century, Australians can be optimistic about our future, but we cannot afford to mistake optimism for complacency."
"I hope the millions of people I've touched have the optimism and desire to share their goals and hard work and persevere with a positive attitude."
"One of the things I learned the hard way was that it doesn't pay to get discouraged. Keeping busy and making optimism a way of life can restore your faith in yourself."
"Truth is, I'll never know all there is to know about you just as you will never know all there is to know about me. Humans are by nature too complicated to be understood fully. So, we can choose either to approach our fellow human beings with suspicion or to approach them with an open mind, a dash of optimism and a great deal of candour."
"For sure, the 'Obamania' that's fast taking hold reflects an incredible thirst for change in global politics and, dare I say, a wave of optimism that things can be different."
"My view is that at a younger age your optimism is more and you have more imagination etc. You have less bias."
"A lot of people over time have had this kind of pattern in their relationship with Bill Clinton. You first meet him and you're overwhelmed by his talent. He's so energetic and articulate and full of ideas and he calls himself a congenital optimist and that optimism is contagious."
"There are grounds for cautious optimism that we may now be near the end ofthe search for the ultimate laws of nature."
"Few things in the world are more powerful than a positive push. A smile. A world of optimism and hope. A 'you can do it' when things are tough."
"The failure of national economic policy is costing us more than jobs it has begun to weaken that uniquely American spirit of risk-taking, large ambition, and optimism about the future. We must rally them now to bold departures that rebuild our national morale as well as our material prosperity."