What is the meaning of this aphorism If your head is made of wax don't go in the sun?

The aphorism "If your head is made of wax, don't go in the sun" suggests that if you possess certain vulnerabilities or weaknesses, you should avoid situations that could exacerbate those flaws. It implies the importance of self-awareness and caution in navigating life's challenges. By recognizing your limitations, you can protect yourself from potential harm or failure.