Love cannot ground trust because the other’s motives stay unknowable.

Evidence

But too often ‘love’s best habit’, as Shakespeare said in sonnet 138, ‘is in seeming trust’. Trying to know her motives, and to know that one knows - quite apart from the ‘costs’, so to speak, of trying to find out what they are, and the strain that all this imposes both on her commitment and on one’s own - would seem often to force Shakespeare’s own conclusion: Therefore I lie with her, and she with me, And in our faults by lies we flattered be. — Diego Gambetta, Trust - Making and Breaking Cooperative…, 1510

Categorization

• XREF: connects to: Love fails because both parties cannot escape objectifying each other. — Jean-Paul Sartre, Being and Nothingness: An Essay on…, 93