The theme that can be found in both "If" and The Jungle Book by Rudyard Kipling is "Learning to stand alone is part of growing up."
In "If," the poem emphasizes personal strength, resilience, and independence as essential qualities for maturity. Similarly, in The Jungle Book, Mowgli's journey involves learning to navigate the challenges of the jungle, eventually embracing his individuality and ability to stand on his own. Both works explore the importance of self-reliance and personal growth.