"What gets said in the call of conscience? Heidegger is crystal clear: like Cordelia in King Lear, nothing is said. The call of conscience is silent. It contains no instructions or advice. In order to understand this, it is important to grasp that, for Heidegger, inauthentic life is characterised by chatter – for example, the ever-ambiguous hubbub of the blogosphere. Conscience calls Dasein back from this chatter silently. It has the character of what Heidegger calls "reticence" (Verschwiegenheit), which is the privileged mode of language in Heidegger. So, the call of conscience is a silent call that silences the chatter of the world and brings me back to myself."
Simon Critchley, Being and Time, part 7: Conscience, at the Guardian
Unfortunately I wasn't around to chat with him on this park bench, as our being and time did not coexist.