By failing to prepare, you are preparing to fail.
Be kind whenever possible. It is always possible.
Begin to be now what you will be hereafter.
The most effective way to do it, is to do it.
Problems are not stop signs, they are guidelines.
Go for it now. The future is promised to no one.
To know oneself, one should assert oneself.
Things do not happen. Things are made to happen.
Never complain and never explain.
If you're going through hell, keep going.
I am a teacher, and I am proud of it. At Cornell University I have taught primarily undergraduates, and indeed almost every year since 1966 have taught first-year general chemistry.