After a storm comes a calm.
Always desire to learn something useful.
If you can dream it, you can do it.
I can, therefore I am.
Be thine own palace, or the world's thy jail.
You never know what motivates you.
Well done is better than well said.
It's always too early to quit.
Problems are not stop signs, they are guidelines.
To know oneself, one should assert oneself.
In hard-core science fiction in which characters are responding to a change in environment, caused by nature or the universe or technology, what readers want to see is how people cope, and so the character are present to cope, or fail to cope.