A chap's bedroom – you can't get way from it – is his castle, and he has every right to look askance if gargoyles come glaring in at him.
A man's bedroom is his personal sanctuary, a place where he can feel secure and comfortable. The idea that it serves as a private castle underscores the importance of having a space free from intrusion or judgment. Therefore, it is entirely reasonable for a man to feel uneasy or even hostile if there are unwelcome or unsettling elements in his sanctuary. Such imagery serves to highlight the protective nature of one's personal space.
This quote from P.G. Wodehouse's "Right Ho, Jeeves" humorously emphasizes the notion that one's bedroom should be a refuge rather than a source of anxiety. The use of "gargoyles" symbolizes anything that disrupts the peace and comfort of this personal domain. It reflects the universal desire for a haven where one can escape the outside world's pressures and absurdities, further supporting the notion of the bedroom as an essential retreat.