There is no contradiction between the theory of evolution and the existence of a divine spirit. Searching for knowledge, gaining insights to life we stumble and fall, sometimes we find wonderful things. What has been created, does not mean that creation is completed, the creator may very well be creating new things for us to discover even now. Einstein said "I want to know gods thoughts, all else is just detail" As for proof, you are here now, and are your own proof of existence of spirit.