10. Hence, though an obstinate fight may be made by a small force, in the end it must be captured by the larger force.

故小敵之堅大敵之擒也

Sun Tzu

Sun Tzu is suggesting that, even if a smaller force is able to put up a strong resistance, they will ultimately be overcome by a larger force. This is because the larger force will have the resources and numbers to continue fighting, while the smaller force will eventually be worn down and defeated. Sun Tzu’s advice, therefore, is to avoid engaging in direct, head-on confrontations with larger forces, and instead use strategy and cunning to outmaneuver them.

In business, though a small company may put up a strong fight, in the end the larger company's superior resources will lead to its victory. 

In the world of business, even if a smaller company is able to put up a strong fight against a larger, more established competitor, the larger company’s superior resources and greater market share will likely lead to its eventual victory. This is because the larger company will have the resources and financial stability to withstand challenges and continue to grow, while the smaller company may eventually be unable to compete. Therefore, it is important for small businesses to use strategy and innovation to outmaneuver their larger competitors and find ways to provide unique value to customers in order to maintain their competitive edge.