Problems are not stop signs, they are guidelines.
It's always too early to quit.
The wise does at once what the fool does at last.
You never know what motivates you.
Be kind whenever possible. It is always possible.
Know or listen to those who know.
What you do today can improve all your tomorrows.
The dog that trots about finds a bone.
If you think you can do it, you can.
Without hard work, nothing grows but weeds.
If you decide to design your own language, there are thousands of sort of amateur language designer pitfalls.