- What a modern leader needs is the time-proven trinity of head, heart and balls! - Thomas Gast frequently taps into his tough times in the French Foreign Legion, and the anecdotes he relates and transfers into the realms of modern management serve to illustrate the importance of timeless virtues: Leading by example in fast-paced and volatile environments; learning to delegate; appreciating individuals and their skills when forging a team; creating corporate culture; taking pride in a code of honour and excellence, etc.