Ustat Nindia (ਉਸਤਤ ਨਿੰਦਿਆ)

One should praise only Lord Guru Nanak
and criticise and condemn only oneself.
Third person should not come in.

Our nature is two-fold in its expression. Either we praise or we criticise. Either we appreciate people whom we like or blame those who are not favourable to us in their dealings. Most of our life passes in giving expression to these pleasant or unpleasant experiences of ours in either praising or blaming others.

A mind established in the Divine discards both.

Ustat Ninda Dou Tyagey
One should renounce both praise and blame (flattery and slander).

Ustat Guru Nanak Di
Nindia Sirif Apni

Baba Nand Singh Ji Maharaj advised all to divert this twofold nature towards God to sing the praises of Sri Guru Nanak Sahib and to condemn and criticise one's own imperfections, shortcomings, mistakes, sins; one should praise only Lord Guru Nanak and criticise and condemn only oneself. Third person should not come in. Self-analysis, self-introspection, self-appraisal reveals to us all our shortcomings and mistakes worth condemnation.