Amit Varma writes @ India Uncut.
The golden rule of thumb, for most bloggers including me, is this: quote or excerpt as you feel like, but attribute (always) and link (whenever available).
Well said. That said, I need to practice that myself! The 'eye' that you see on the right side of this blog is from here
. I wanted a picture of an eye -- Locana is Sanskrit for eye -- and got this image via Google.