It's grammatically incorrect.

Are architectural spaces manipulative? If I visit a school and want to see a church, is it any more of a church or any less of a school? Don't get into architectural relativism at this point.

ok ,will remove the quote ,what about the photograph ?

I really like how it's a rotated image that looks like a hallway the way you have it.  The quote brings it together - does it need a reference? Although, I'm unsure about the composition of the text. ^I do have to agree with 24arches though about the concept behind it.

Did you turn it around on purpose?

ya it was a staircase ,i made it rotate by 90 degree,now the stairs look more like a wall and we are supposed to go around it

Depends on how it works into the rest of your portfolio. If your only reason for flipping it was to support that quote, I don't know how well-received it'll be without context. 

any quote from your side???

I wouldn't put quotes (other peoples work) on the cover of your work - use it on the back cover or turn-in/pastedown gatefold/inside cover sheet if you feel you need it.

I think the image speaks for itself, is very evocative, and can be a great cover without all that text over top of it. In my humble opinion, all the text you need there is NIRANJAN. I am assuming the context of reviewing applications will make the 'portoflio' tag redundant. If it's meant to sit on a shelf alongside other kinds of books, I would put 'portolfio' on the spine. 'M.Arch first professional degree' - font size too big. If you need this text, it should not exceed the size of the type used in the quote. You can see some great minimalist examples of larger and smaller type combined in a heading here.
Consider restricting your text to:
NIRANJAN {bold/large type}
M.Arch I portfolio {skinny/small type}

Is it your own photograph? Is this building somehow significant to you other than to illustrate your point about visual manipulation of space? I might be more interested in finding answers to these questions than just seeing the quote, which re-affirms what the image is already telling me - but I don't want all this info to be covering the image... This sort of info will find a good home on the back cover if you wish to enable the viewer to get answers without opening the book, or on the inside cover sheets if you wish to prompt the audience to flip.

thanks threadkilla for your inputs

i got it from a friend.the building is not significant to me ,used the image for making the point

That's your cover page - you're first impression and you're using some one else photo. Now that's not a good start.

i think it is your image. the photo is not interesting on its own, but rather because of the way you have edited (i.e. rotated) it. if it was published elsewhere, it would be a bit more tricky, but given that your friend gave it to you, i see no problem if you don't credit anyone.

i agree that there is too much text on the cover though. if you feel a real need to clarify the reasoning behind choosing that as your cover, include a brief sentence or two on a turn-in/inside flap or whatever. i would also avoid trying to make such a profound sounding statement. keep your word choice simple and honest; you're not experienced with architectural theory, and you're not going to fool anyone. the admissions committee will appreciate the fact that you are thinking about how spaces are experienced/interpreted, and won't expect a fully formed, groundbreaking statement (if you could do that, an M.Arch I probably wouldn't be the place for you).

I also agree that the work inside the portfolio should relate to ideas of interpretation or spatial affect in one way or another.

I would not put images of built environments that I wasn't a part of designing on the cover of my architecture portfolio. I would only include them inside my portfolio if they were relevant to the process of my design (and even then I'd reconsider) or part of my sketching / fine art sections.