By the Spirit I mean the Holy Spirit, which Jesus promised us would be our guide. "But when he, the Spirit of truth, comes, he will guide you into all truth. For he will not speak on his own authority, but will speak whatever he hears, and will tell you what is to come." John 16:13
So, tariki, if you have no interest in the Holy Spirit, then you are denying what Christ has promised to Christians. Without the Holy Spirit you are denying Christ.