It seems that the present situation itself is extremely terrible.
So why bother thinking more about these issues that are right before your eyes, as if there was another you contemplating them?
What he said at the moment only elicited a suspicious glance from Old Hawke.
Moreover, facing what you see and what's happening before your eyes, there is no need for further consideration or speculation.
In that instant, he realized that what he just did was a mistake.
Everyone is likely to make a stupendously foolish mistake when facing a situation, but eventually, there will come accurate results.
It is enough to be sure, as long as you do not make a series of mistakes that make everyone think you are being extraordinarily foolish.
Therefore, in such a situation, facing a problem, there's no need for further consideration, or say, suspicion.
He shut his mouth as soon as he faced the suspicious gaze from Old Hawke.