The Syrian people have not given up, which is why we cannot give up.

WHITEHOUSE: President Obama Speaks on Preventing Mass Atrocities

We cannot give up now.

WHITEHOUSE: Remarks by the President in Lima, OH

"The public can of course continue to express scepticism, but we cannot because give up helping compatriots in earthquake-stricken areas of Lushan because of distrust of an organisation, " Beijing Youth Daily commentator Shu Shengxiang adds.

BBC: China media: Quake response

If we assume other people hold rigid beliefs that cannot be altered, we give up on their ever being part of our family or community.

FORBES: Win By Letting Your Enemy Win

Before we ask seniors to pay more for Medicare, we should ask the wealthiest taxpayers to give up tax breaks we simply cannot afford under these circumstances.

WHITEHOUSE: Weekly Address: A Bipartisan Approach to Strengthening the Economy | The White House

If you cannot give up, if you can believe, then we can believe.

WHITEHOUSE: President Obama Speaks on Preventing Mass Atrocities

So what give me passion, what keeps me pumped up is the belief and understanding that we cannot turn back now.

WHITEHOUSE: The White House