Life is fragile but can be strengthened when one is armed with enough knowledge on how to protect oneself from danger.
生命是脆弱的,但是当你有足够的知识去保护自己免遭危险的时候,你会得到加强。
Now they have become 「smart」. This is a pitiful form of 「smart」 because it grew out of the need to protect oneself from the harmful antics of others it is really devious scheming.