I cannot will myself to believe that X is my friend, I can only believe that he is. Nor can they easily be manipulated in order to bring about mutual trust and fruitful cooperation: if X detects instrumentality behind my manifestations of friendship, he is more likely to reject me and, if anything, trust me even less

Builds on: "Personal bonds require trusting friends more than strangers."

Diego Gambetta, Trust - Making and Breaking…, loc. 2841