Stick to your Guru

Come what may, leave not, but stick to your Guru and ever remain steady, always in union with him. May Guru's blessings always shower on you. 

There should be steadfast faith that Guru

There is no need of elaborate means of knowledge. There should be steadfast faith that Guru alone is the protector and destroyer.

I pledge that I would cross even the seven seas

I pledge that I would cross even the seven seas to help those who seek My protection. God runs to help  devotees in times of danger. 
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The attitude of 'you' and 'me' is this wall between the Guru and his disciple

The attitude of 'you' and 'me' is this wall between the Guru and his disciple. If it is not pulled down, the state of oneness between them is difficult to breach.  

Trust in the Guru fully and wholeheartedly

Trust in the Guru fully and wholeheartedly. Leave off all doubts. That is the only Sadhana. Guru is God. Guru is everything. He is your mother, father, well wisher, relative and true friend. Seeing all as Guru is the highest state and he who feels Him in every creature verily becomes Myself. 

Surrender does not mean mere prostration and service to the Guru.

Surrender does not mean mere prostration and service to the Guru. It means complete surrender of everything, including the body and mind, with the conviction that the body belongs to the Guru and exists merely to serve Him. 

There are innumerable saints in this world but "our father' (Guru) is the Father (Guru)

There are innumerable saints in this world but "our father' (Guru) is the Father (Guru). Others might say many good things but we should never forget our Guru's words. 

If you worship Him wholeheartedly

If you worship Him wholeheartedly and chant His nameceaselessly, you will experience His leelas.
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I grant all the wishes of him who chants my name with love

I grant all the wishes of him who chants my name with love and faith, which, in turn, enhances his devotion to me.
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From Sai SatCharitra chapter 3.

If one meditates on Me, repeats my name

If one meditates on Me, repeats my name, sing my deeds and thus is transformed into Me, his karma is destroyed. I will stay by his side always.

If one sees me only, always listens to talk about Me

If one sees me only, always listens to talk about Me, and perpetually repeats 'Sai' 'Sai' with heart
overflowing with devotion. He will reach to God, he need not feat or worry for his body and soul.