A despicable act is the violation of moral principles and ethical standard. Such act goes beyond mere unpleasantness to being profoundly wicked or harmful. There are those section of people who always wanted to commit foul task that may bring loss to others. It gets very difficult to deal with such person. These were the master of darkness, who can never think of doing good to others. Sanskrit have following to say about these kind of people ;
अतिमलिने कर्तव्ये भवति खलानामतीव निपुणा धीः |
तिमिरे हि कौशिकानां रूपं प्रतिपद्यते दृष्टिः||
Atimaline kartavye bhavati khalaanaamateeva nipunaa dheeh . Timire hi kaushikaanaam roopam pratipadyate drushtih.
Atimaline = ati + maline.
ati = very much.
Maline = dirty, foul.
Kartavye = task, duty.
Bhavati = happens, become.
Khalaanamateeva = Khalaanaam + ateeva. Khalaanaam = wicked persons.
Ateeva = very, extremely.
Nipunaa = keen, sharp.
Dheeh = intelligence.
Timire = darkness.
Hi = surely,
Kaushikaanaam = owls.
Roopam = figure, appearance.
Pratipadyate = comes back.
Drushtih = eyesight, vision.
i.e. Evil and vile people have the keenness and super intelligence for committing extremely despicable acts, just as an owl's, who get the ability to see and judge things clearly comes back only in darkness.
A "wicked mind" often display a cold, calculating, or indifferent side, using their intellect for dark purposes. They always look for their own self interest and try to disturb the work of others through their bad intention. Their thought and behavior become negative and difficult to break.