At a time when science plays such a powerful role in the life of society when the destiny of the whole of mankind may hinge on the results of scientific research it is incumbent on all scientists to be fully conscious of that role and conduct themselves accordingly.

To give aid to every poor man is far beyond the reach and power of every man. Care of the poor is incumbent on society as a whole.

Knowledge of the self is the mother of all knowledge. So it is incumbent on me to know my self to know it completely to know its minutiae its characteristics its subtleties and its very atoms.

If I were running to be somebody there are a lot of easier sombodies to be. After all running against the incumbent governor of your own party in your home state is not the next logical step in a political life.

The great and important duty which is incumbent on Christians is to guard against all appearance of evil to watch against the first risings in the heart to evil and to have a guard upon our actions that they may not be sinful or so much as seem to be so.

In fact corporate and union moneys go overwhelmingly to incumbents so limiting that money as Congress did in the campaign finance law may be the single most self-denying thing that Congress has ever done.

It is incumbent upon each of us to improve spending and savings practices to ensure our own individual financial security and preserve the collective economic well-being of our great society.

Fools rush in where incumbents fear to tread.

Close elections tend to break toward the challenger because undecided voters - having held out so long against the incumbent - are by nature looking for change.

All non-incumbent campaigns promise hope and change but Obama took the promise to a new level of absurdity. He suggested that a vote for him would literally transform the Earth.