登峻者戒在于穷高，济深者祸生于舟重。
出自《抱朴子·博喻》。登高的人，要警惕的是爬高了会摔下来，渡深水的人，往往是因为船太重才出了祸。要适可而止，不要过于贪婪。
I don't want to be a product of my environment. I want my environment to be a product of me.
The question I ask myself like almost every day is, 'Am I doing the most important thing I could be doing?'
化学的进步以新元素的发现和分析方法的改进为标志。