About God:

"You can’t say its reality. You certainly can’t say it’s a fiction because something exists. That something needs to be experimented. Nothing can be said about God. You can study about God but nothing has been known because all you know is from the outside, what we would call external. Until you enter from within, the internal can’t be known.

By studying about God, you will miss the whole concept and the consequence to that is that you are left with knowledge only. To know is to enter the kingdom, to become one with eternity. Knowledge is from the outside and has nothing what so ever to do with God. Because God is happening.

Nothing is hidden from God because God is the inside of everything. The inside knows all. You can hide something from others, but you can’t hide it from yourself. And it is there that God is hidden.

Why have we invented so many names for God? There must be a certain reason, because God cannot be named, a name can easily be changed, but God remains the same. So why has God been addressed? Because there are moments when you would like to scream out your inner feelings to God in sheer joy. Some name is needed. Muslim Sufis invented ninety-nine names of God that are so beautiful, but why not a hundred? Ninety-nine looks a bit incomplete. There is a certain reason the hundredth name is kept silent and that is the true name of God, which of course can’t be uttered. That is why Guru Nanak said ‘Sat Naam’. Your name is the Truth.  But in reality you can’t utter it because it will lose its’ beauty. It remains un-uttered at the deepest core of the heart. What is God’s true name? Nobody knows that all the names are man’s creation. The true name of God is the existence that surrounds you.

How can one call Him by all His names?

"The wise give him names according to His manifestations." – Jaap Sahib, Guru Gobind Singh Ji.

Those kind (the irreligious) of people haven’t known anything of spiritual experience. They’ve never felt any presence of God. The only way to receive God is to drop all your searching and seeking. The real question is recognition, not search, and the only way to know God is to live God."

 http://www.sikhroots.com/index.php?option=com_content&task=view&id=204&Itemid=27