kant scepticism

Kant says scepticism arose out of metaphysics and the lawlessness of it dialetic. At first skepticism declared in favor of the use of reason in experience, but as it was seen that the same principles a priori which are used in experience and as it seemed with equal right led further than experience reaches, doubt began to be placed even in principles of experience. There is no danger in this, for sound sense will always assert its rights in experience, but then there arose a confusion as to how far reason can be trusted. this confusion can only be removed, and all future relapses prevented, by formal determination, drawn from principles, of the boundaries of the use of reason. We can give no determinate concept of what things may be in themselves beyond all possible experience, but we are not free to refrain completely from enquiry after them; for experience is never entirely without reason. i think he means that you dont have to always doubt everything, like Descartes, but once reason works you can use it because it has proved to work.