What is creativity?

What is creativity? What creates that spark, that vibrant idea? Is it a 'state of mind' people are born with or is it something learnt?

I have attended workshops on creativity and all that is shared is the way the project was developed, the stepped process. I want to learn about what is it in the mind that generates the work. I look at paintings and wonder what was the thinking process that generated the work.

I would love to hear your views on what creativity is.