Problems are not stop signs, they are guidelines.
Be thine own palace, or the world's thy jail.
After a storm comes a calm.
Be kind whenever possible. It is always possible.
Begin to be now what you will be hereafter.
Well done is better than well said.
Who seeks shall find.
Always desire to learn something useful.
It's always too early to quit.
To know oneself, one should assert oneself.
One of the nice things about science fiction is that it lets us carry out thought experiments.
Some ideas you have to chew on, then roll them around a lot, play with them before you can turn them into funky science fiction.