Great nukuu about losing a great teacher??

My school Lost a fantastic teacher about a mwezi ago, since it's krisimasi break, me and my 2 best Marafiki 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 kwa the number of breaths we take, but kwa 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 wewe oh, so much.