足元の明るいうちに
Meanings
1
while it's still light; before dark
Literal meaning: take action while there is still daylight, often implying safety or practicality.
Let's go down the mountain while it's still light.
2
while the going is good; before things get worse
Figurative extension: seize the opportunity before conditions deteriorate; often used as a proverb-like warning.
While the economy is good, we should consider investing before things get worse.