I think a teacher must always be inspiring and motivating. 

Integrating quotes, proverbs and aphorisms in your English lessons will improve your students´ vocabulary, spelling and, what is more important, they will take something home with them for personal reflection. 

You can hang motivational posters on the walls, write a different quote on the blackboard every day, choose the quote of the week, discuss it, match the two halves of a quote, etc.

Remember, a good teacher teaches, a great teacher inspires.