Was reading Fredrick Copleston's A history of philospohy and came across this when he was describing the electic philosoher Cousin:
"Accourding to Cousin, reflection on the history of philosophy reveals that there are four basic types of system, which are 'the fundamental elements of all philospohy'. In the first place there is sensualism, the philospohy 'which relies exclusively on the senes'. Then there is Idealism, which finds reality in the realm of thought. Thirdly there is the philospohy of common sense. And in the fourth place there is mysticism, which turns its back on the senses and takes refuge in interiority. Each of these systems or types of systems contains some truth, but no one of them contains the whole truth or is uniquely true. For example, the philospohy of sensation must obviously express some truth, as sensibility is a real aspect of man. It is not however the whole of man. In regard therefore to the basic kinds of system we have to be careful 'not to reject any one, and not to be the dupe of any of them."
Sounds suspiciously MBTI right?!