Quality is not an act, it is a habit.
Well done is better than well said.
Go for it now. The future is promised to no one.
Know or listen to those who know.
Problems are not stop signs, they are guidelines.
Things do not happen. Things are made to happen.
Without hard work, nothing grows but weeds.
You never know what motivates you.
The wise does at once what the fool does at last.
I can, therefore I am.
If you decide to design your own language, there are thousands of sort of amateur language designer pitfalls.