Sun Tzu is stating that a general (or leader) who is familiar with the five heads (or constant factors) will be victorious in battle (or successful in their endeavors), while those who are not familiar with these principles will fail. Sun Tzu is emphasizing the importance of being well-versed in these principles in order to achieve success.
These five constant factors should be familiar to every leader: he who knows them will be victorious; he who knows them not will fail.
In order to be successful in business, every leader must be familiar with the following five constant factors: strategy, market conditions, competition, leadership, and logistics. Those who are familiar with these factors and know how to use them effectively will be successful, while those who are not familiar with them will struggle. It is important for business leaders to understand and master these factors in order to succeed in the highly competitive business world.