Yogi: How can I detect doubt before it moves to the house? How do I prevent doubt?

Sayadaw: It is not possible; but there is a principle that when there is more wisdom, there is less doubt. 

Doubt is a function of delusion – so, when there is more wisdom, there is less delusion hence less doubt. 

I agree that doubt is a difficult mind to have around and to live with. I have experienced it and we don’t really know what to do. We are left mired in doubt.