Rainer Lenz is an expert in internal auditing with over 20 years of experience as a corporate auditor and CFO. He discusses making the internal audit function more effective using the SUCCESs model of sticky ideas. The model emphasizes keeping ideas simple, unexpected, concrete, credible, emotional, and telling stories. Lenz argues internal auditors should take a "farmer" approach of humbly strengthening organizations from within instead of using formal authority. They should focus on active listening, ask questions, and help organizations adapt to changing environments. The key is for auditors to fully immerse themselves in organizations by "swimming in the water" instead of standing on the sidelines.