The most positive men are the most credulous.

The most imaginative people are the most credulous for them everything is possible.

Man is a credulous animal and must believe something in the absence of good grounds for belief he will be satisfied with bad ones.

I like to use 'I Can't Believe it's Not Butter' on my toast in the morning because sometimes when I eat breakfast I like to be incredulous. How was breakfast? Unbelievable.