How do i view a teacher...metaphorically

Few days ago, Dr. Edwin asks my class a question, ‘how will you view you yourself as a teacher’? There are a lot of different answers from my friends, such as berry bush, binocular, diamond, etc. For me, a teacher is like a box of crayon. Teacher puts colours in students’ life by giving knowledge to them, which they can benefits of. Not all teachers give good impressions to students, for example there are some teachers who just simply walk in the class and ask the students to work on their own reading. Thus, it’s surely paint a black colour in students’ life. It’s true like Dr. Edwin said that crayon is easily broken, so does a teacher. Teachers also have their own problems, and not all of us are strong and tough, thus, we can be easily emotionally break down on certain times, which also can affect our students.