一隅を照らす

Literally this means “to illuminate one corner.”  It is a quote by Saicho, famous Japanese Buddhist monk in 8th century.  To illuminate the corner where you are is another way of saying “do the best wherever you are”, which is actually all you can do anyway.  By doing the very best where you are, if everyone does the same, the whole world would become a better place.  My translation is simply “Shine where you are”, and I believe you get the sense.

syo02