Go for it now. The future is promised to no one.
Be kind whenever possible. It is always possible.
The most effective way to do it, is to do it.
It's always too early to quit.
Without hard work, nothing grows but weeds.
Well done is better than well said.
Only the educated are free.
If you can dream it, you can do it.
The wise does at once what the fool does at last.
Know or listen to those who know.
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.