What does Rudyard Kipling mean by hold on where there is nothing in you?

Rudyard Kipling's quote "hold on when there is nothing in you" is part of a larger message about perseverance and resilience in the face of challenges. It suggests that even when one feels completely depleted or lacking in strength or resources, it is important to continue holding on and not give up. The quote encourages individuals to push through their limits and find the inner strength to endure difficult situations. It emphasizes the idea that even in moments of extreme adversity, there is still the potential for success or positive change if one remains steadfast and refuses to give in.