उष्णो दहति चाङ्गारः शीतः कृष्णत्यते करम्॥

दुर्जनेन समं सख्यं प्रीतिं चापि न कारयेत्।

उष्णो दहति चाङ्गारः शीतः कृष्णत्यते करम्॥

सुभाषितम्॥

durjanena samaṁ sakhyaṁ prītiṁ cāpi na kārayet|

uṣṇo dahati cāṅgāraḥ śītaḥ kṛṣṇatyate karam||

subhāṣitam||

One should avoid friendship with bad people and one should also show no favour to such people.

When burning, the charcoal will scorch our hands, if we touch it.

When not burning it will make out hands dirty with black colour.

So like a lump of charcoal, a bad fellow is dangerous when he is active and when he is quiet too..

Of the donkey, there is a saying .. if you go before it, it will attack you and will pull you down with its head.. If you go behind it it will kick you with its hind legs.. Anyway downfall and injury are ensured.. once you come in contact with a donkey.. Contact with idiots and evil minded snobs also would result in the same physical and mental consequences for you..

Kick ensured..