Pure in heart?

You may remember - or you may not - that I set myself the task of writing something each week to fit in with the study we're doing in Zac's on the Beatitudes. This week the blessed ones are the pure in heart.

Blimey, it's a hard one. Is pure in heart the same as pure in mind? Can you have one without the other? And loads of other questions including:

why am I blogging it about it instead of writing about it? Because it's too flipping hard.