This week's proverb is "Toudai moto kurashi (灯台下暗し)." It literally means, "The lighthouse does not shine on its base." It refers to the idea that "we are apt to overlook important things that lie near at hand" or "it is often difficult to see what's right in front of your eyes." It is similar to the English expression, "The darkest place is under the candlestick."
Here is some vocabulary from the proverb.
toudai --- lighthouse
moto --- base
kurashi (kurai) --- dark