I was reading 'The Clone Wars-Wild Space' the other day and the book depicts how hard it was for Obi Wan to even go near a Sith temple which contained ancient Sith artifacts including a holocron, and Obi Wan was nearly driven mad.

But Sith lords like Palpatine didn't even feel discomfort at being so near the Jedi Temple, which was a concentration of light side power.

Is this explained in the EU?