By singing of greatness we improve our character

From Asa Ki Vaar -

ਸਤਿਗੁਰੁ ਵਡਾ ਕਰਿ ਸਾਲਾਹੀਐ ਜਿਸੁ ਵਿਚਿ ਵਡੀਆ ਵਡਿਆਈਆ
ਸਹਿ ਮੇਲੇ ਤਾ ਨਦਰੀ ਆਈਆ
ਜਾ ਤਿਸੁ ਭਾਣਾ ਤਾ ਮਨਿ ਵਸਾਈਆ
ਕਰਿ ਹੁਕਮੁ ਮਸਤਕਿ ਹਥੁ ਧਰਿ ਵਿਚਹੁ ਮਾਰਿ ਕਢੀਆ ਬੁਰਿਆਈਆ
ਸਹਿ ਤੁਠੈ ਨਉ ਨਿਧਿ ਪਾਈਆ ੧੮

Praise the Great True Guru; within Him is the greatest greatness.
When the Lord causes us to meet the Guru, then we come to see them.
When it pleases Him, they come to dwell in our minds.
By His Command, when He places His hand on our foreheads, wickedness departs from within.

When the Lord is thoroughly pleased, the nine treasures are obtained. ||18||

Related to: Jo Mange Thakur Apne Te, Vadde Mere Sahiba