Tirukkural-On Virtue-Fear of Evil-Kural 209

If you love yourself, it is wise to eschew Even the thought of wrong-doing

A biblical parallel to the idea is as follows:

'And as you wish that men would do to you
do so to them'.

(Luke 6:31)

But Bernard Shaw might differ, in his characteristic way, and say 'Don't do unto others what you wish to be done unto you', for their tastes may be different. But the dictates of old-time charity as well as the modern concepts of empathy and social justice would support Valluvar's and Biblical line. In addition, the instruction there is that the very thought of evil does as much harm to you also in the process, and so it is best kept away.