Problems are not stop signs, they are guidelines.
The wise does at once what the fool does at last.
Without hard work, nothing grows but weeds.
Be kind whenever possible. It is always possible.
If you've got a talent, protect it.
It's always too early to quit.
To know oneself, one should assert oneself.
Well done is better than well said.
The dog that trots about finds a bone.
I can, therefore I am.
Imagination is as vital to any advance in science as learning and precision are essential for starting points.