This well-known biblical phrase can leave us cold if we think first in terms of scientific truth, of the truth of propositions. Truth in its biblical sense is the word of God and is 'sharper than any two-edged sword'. It is not merely assertion or demonstration of what is true 'in abstract', but a living demanding incursion into man's situation with others in life. The truth which will make us free is that which, as the author says, "is never without a demand for a response on our part. . . for it puts man into the crisis of judgement." Schnackenburg is one of Germany's leading Catholic scholars and his work on the New Testament is both erudite and important. In this small book he has packed the fruit of his scholarship into popular form in order to show what a genuine understanding of the biblical idea of truth can do for our lives as Christians.