Is there a connection between Guilt and Fear?
In Buddhism, there are two important related words that are generally used as a word compound, namely, 'hiri-ottappa'. 

'Hiri' means to feel personally &amp; inwardly ashamed of hurting others or oneself.  

'Ottappa' means to have an innate 'fear', 'apprehensiveness' or 'caution' about hurting others &amp; oneself. 

A translation of these two words which captures their meaning is 'conscience &amp; concern'. A short essay on hiri-ottappa can be read at this link: The Guardians of the World (by
Bhikkhu Bodhi).

These two natural psychological self-protective mechanisms, which are mentioned in Lokapala Sutta: Guardians of the World (AN 2.9), can be related to 'guilt' &amp; 'fear'. 

However, 'guilt' &amp; 'fear' are very strong words &amp; emotions, which often are not related to the natural psychological conscience but related to guilt &amp; fear imposed by external authorities ('asura').