Why Did Guroo Nanak Mahraj come to world

Our mind often asks one question after another. One question is why did Guroo Nanak Sahib Mahraj come to this earth. Guroo Sahib gave us Gurmantar of VahiGuroo which is the ultimate jap from Akal him self. We do not realise how great this one word is. this word which will bring us out of darkness of Kuljug and saying it once changes out mood from sad to happy in anand. This is what respected Bhai sahib Bhai Gurdaas Ji says about GUroo Nanak Sahib comming to this earth.

This Shabad is by Bhai Gurdaas Ji in Vaars Bhai Gurdaas on Pannaa 1


ਸੁਣੀ ਪੁਕਾਰ ਦਾਤਾਰ ਪ੍ਰਭ ਗੁਰ ਨਾਨਕ ਜਗ ਮਾਹਿੰ ਪਠਾਯਾ॥
sunee pukaar dhaathaar prabh gur naanak jag maahi(n) pat(h)aayaa
The benefactor Lord listened to the cries (of humanity) and sent Guru Nanak to this world.

ਚਰਨ ਧੋਇ ਰਹਿਰਾਸ ਕਰ ਚਰਨਾਮ੍ਰਿਤ ਸਿੱਖਾਂ ਪੀਲਾਯਾ॥
charan dhhoe rehiraas kar charanaamrith skhiaa(n) peelaayaa
He washed His feet, eulogised God and got his Disciples drink the ambrosia of his feet.

ਪਾਰਬ੍ਰਹਮ ਪੂਰਨ ਬ੍ਰਹਮ ਕਲਿਜੁਗ ਅੰਦਰ ਇਕ ਦਿਖਾਯਾ॥
paarabreham pooran breham kalijug a(n)dhar eik dhikhaayaa
He preached in this darkage (kaliyug) that, saragun (Brahm) and nirgun (Parbrahm) are the same and identical.

ਚਾਰੈ ਪੈਰ ਧਰੰਮ ਦੇ ਚਾਰ ਵਰਨ ਇਕ ਵਰਨ ਕਰਾਯਾ॥
chaarai pair dhhara(n)m dhae chaar varan eik varan karaayaa
Dharma was now established on its four feet and all the four castes (through fraternal feeling) were converted into one caste (of humanity).

ਰਾਣਾ ਰੰਕ ਬਰਾਬਰੀ ਪੈਰੀਂ ਪਵਣਾ ਜਗ ਵਰਤਾਯਾ॥
raanaa ra(n)k baraabaree pairee(n) pavanaa jag varathaayaa
Equating the poor with the prince, he spread the etiquette of humbly touching the feet.

ਉਲਟਾ ਖੇਲ ਪਿਰੰਮ ਦਾ ਪੈਰਾਂ ਉਪਰ ਸੀਸ ਨਿਵਾਯਾ॥
oulattaa khael pira(n)m dhaa pairaa(n) oupar sees nivaayaa
Inverse is the game of the beloved; he got the egotist high heads bowed to feet.

ਕਲਿਜੁਗ ਬਾਬੇ ਤਾਰਿਆ ਸੱਤਨਾਮ ਪੜ੍ਹ ਮੰਤ੍ਰ ਸੁਣਾਯਾ॥
kalijug baabae thaariaa saathanaam parrh ma(n)thr sunaayaa
Baba Nanak rescued this dark age (kaliyug) and recited ‘satinam’ mantr for one and all.

ਕਲਿ ਤਾਰਣ ਗੁਰ ਨਾਨਕ ਆਯਾ ॥23॥
kal thaaran gur naanak aayaa aa
Guru Nanak came to redeem the kaliyug.