Role of a teacher ?

Teacher is the most important person in our life.Its a saying that "our first teacher is our mother".It's totally right because when we are a child we started doing things with the help of our mother.Then we grow up,go to the school,here we go our mother teacher ,who teaches us how to write?,who to read?.then now we become a high school students.Here we got many teacher which not only teaches us bookish knowledge but also give us knowledge of many imp things in life.Here many teachers plays an imp role in building our personality.Teachers teaches us how to think?,how to take dicisions? The most imp teacher in our lives are our failure.when we fail we got an exact idea what to not do? How to got success? Without these teacher we can't succeed in life