Artur Ekert, a leading scientist in quantum cryptography, emphasizes the importance of critical thinking and cross-disciplinary knowledge.He believes that being able to connect different fields of study is crucial for advancing scientific understanding.Ekert also mentions that the administrative aspects of his job are the least favorite, while meeting interesting people is the most enjoyable.Reflecting on his career, Ekert encourages following instincts and interests, without being overly concerned with practicalities.