Noun
The blood necessary to life; vital blood.
Fig.: That which gives strength and energy.
Source: Webster's dictionaryLet me remind you that credit is the lifeblood of business, the lifeblood of prices and jobs. Herbert Hoover
Poetry is the lifeblood of rebellion, revolution, and the raising of consciousness. Alice Walker
If co-operation, is thus the lifeblood of science and technology, it is similarly vital to society as a whole. Arthur Compton
A good book is the precious lifeblood of a master spirit. John Milton
Money is the lifeblood of startups. You stay in business until you run out of it. Steve Blank
Consumer debt is the lifeblood of our economy. All modern nation states are built on deficit spending. Debt has come to be the central issue of international politics. But nobody seems to know exactly what it is, or how to think about it. David Graeber