Writing is a way of bearing witness to the world.
The great advantage of old age is that you can be as rude as you like.
To wear your heart on your sleeve isn't a very good plan; you should wear it inside, where it functions best.
我一直在思考如何使电池更安全、更高效。
解析：知道自己还有所不知，这是很高明的。不知道却自以为知道，这就是很糟糕的。
The trend is your friend until it ends.