Attention is focused on the necessity of the young doctor self-improvement and self-education, characteristics of doctoring and the clinical medicine duel nature are described. Specific features of the diagnostic process and doctor’s work psychology in the era of the up-to-date highly technological medicine are presented. The importance of the patient psychological assessment is stressed. Difficulties and specific features of diagnosing diseases of the psychogenic origin are stated. Certain attention is paid to the doctor’s speech culture, words meaning and influencing the patient curation process. Doctor’s errors are characterized, the doctor’s actions when he/she has made errors are described. The Doctor’s Prayer, the text of Maimonides’, a celebrated doctor of the Middle Ages, is presented.