How much do you respect the catholic priests?

The bible says that we commit sin even if we just think of the act that is sinful. In the case of the catholic priests, how clean are their thoughts? I heard some are even pedophiles and some nuns. And I thought that they rurn their backs from worldly sins once they enter priesthood? Is the cathollic church full of lies?If that's the case, what makes them different from ordinary church goers? And yet I know some priest who have blasphemous mouths. Just asking your opiniion.