What is blood line?

Famous quotes containing the words line and/or blood:

    I thank heaven for a man like Adolf Hitler, who built a front line of defense against the anti-Christ of Communism.
    Frank Buchman (1878–1961)

    If you strike a child, take care that you strike it in anger, even at the risk of maiming it for life. A blow in cold blood neither can nor should be forgiven.
    George Bernard Shaw (1856–1950)