You can't do anything if a person says no. In such a case, there's nothing you can do - unlike the popular cliche that pressure is exerted, or that maybe an unwilling source is done away with.
Markus WolfMaking use of human weaknesses in intelligence work is a logical matter. It keeps coming up, and of course you try to look at all the aspects that interest you in a human being.
Markus WolfThere were some tragic cases of women whose love was abused, who for a certain time procured important documents or information, not knowing who for, what service they worked for, and for a variety reasons got jailed, were tried and sentenced.
Markus WolfOne person can take papers, photograph them without getting excited, return them, and give them away without any scruples; while someone else has to overcome an enormous obstacle.
Markus Wolf