"全世界是一个舞台，所有的男人和女人不过是些演员。他们有自己的出场和退场；每个人在他的时代扮演着多重角色。"

Simplified Meaning:

Think of life like a big play in a theater. Everyone, including you, is an actor with different roles to play. Sometimes you enter the stage (like when you start a new phase of life) and sometimes you exit (like when you finish something or move on). Throughout your life, you'll act differently in various situations – as a student, a friend, a worker, or a parent. Each of these roles is like a part in a play, and you perform them at different times. For example, consider a teacher. In the classroom, they play the role of an educator, guiding students and sharing knowledge. At home, they might switch roles to a parent, caring for their children and managing a household. Just like actors, people perform different roles based on where they are and who they’re with. Understanding this can help you adapt to new situations and appreciate the different parts others play in their lives.