If there is a swing from trust to distrust – and the same is true in the rarer reverse case – then the distruster adapts his behaviour to this new pattern of expectation and thus makes his change of attitude socially apparent. Distrust is made manifest by distrustful behaviour. Interpersonal behaviour is not a matter merely of ad hoc experience but something interpreted in terms of underlying 'attitudes', and used for the formation of expectations. Thus the distruster, willingly or unwillingly, can hardly avoid his distrust being perceived in him and attributed to him. Hostile feelings are difficult to keep hidden, and the cautious defences which now seem necessary betray the intention.

Niklas Luhmann, Trust and Power, loc. 271