Somewhere in the posts of this forum one member says that Sikhs or khalsas believe that GOD lies in each living organism.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/christianity/24-many-christians-believe-jesus-god-what.html
And one of the members here in this post says that Sikh religion does not believes in human beings as God.
Every prophet has empasized that he was the last prophet and he himself is the GOD . The reason is that Human being are so stubborn that to bring change in the human being some psychological technique is used.
If any of the prophets would have said that they are not God , No one would have followed him.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=24
And as far as gurus concerned , even if they had said that it is their observation and philosophy no one would have listened to him.
Take a simple test :
If any of the member says that whatever he /she is writing has been revealed by the Guru Nanak Dev ji himself , to him in the Dreams , then see how people will start treating him as GOD.
This is just example , but here is real story of DELHI gurudwara.
In of the gurudwaras there is a belief that , where the gurudwara is built , there used to live a family . And in that family a child or youtha has claimed that he/she has himself witnessed the Shahib Zadas of Guru Gobind Singh ji , wandering in their house.
Now that house has been converted to a Gurudwara . ANd the belief is that if anyone visits that Gurudwara for five tuesdays his/her wish is fullfilled.
So , the conclusion here is that whoever prophet said that he is God himself it doesn't meant that he actually was GOD but a psychological need to say so .
Just like there is difference between the two words:
internet and Internet .
Same is the difference between the phophets saying as God and original formless GOD.