He condemned war as unchristian. He felt that “the law of the Christ ” should govern a Christian, no matter what consequences that would have.
१४४० साली, केल्चेस्कीने आपल्या शिकवणुकी विश्‍वासाचे जाळे (इंग्रजी) या पुस्तकात नमूद केल्या.