I am on a permanent contract in a university which I am really not very happy with, my career has taken a direction into admin/ management which takes me completely away from the research and teaching I really enjoy. I am unhappy at the institution overall, my workload is unsustainable and there is little joy left in the job. I have been approached by another institution (where I have formally worked so know it's strengths and weaknesses) to take up a dream post which feels like it was literally made for my research and teaching specialism... but, it is only funded for four years with a chance (quite a good chance in reality) of continued funding. Permanent posts are like gold dust in my area and leaving one is a risk and I'm not guaranteed of getting another. However four years is a long time and I'm confident I am very capable of the post, and a lot of things can change in that time. Head, heart, desire, ambition, aspiration, dreams, etc all tell me to jump and go for it - logic, lack of confidence and insecurities tell me stay put.... advice?