Great Цитаты about losing a great teacher??

My school Остаться в живых a fantastic teacher about a месяц ago, since it's Рождество break, me and my 2 best Друзья are making a poster to remember him by..
we need great quotes, anything motivational to keep the students going after this hard time would be wonderful.

"Life is not measured by the number of breaths we take, but by the number of moments that take our breath away." <- we're using that as one, because that quote was at the sad sad funeral. (:

Thank Ты oh, so much.