It's always too early to quit.
If you can dream it, you can do it.
By failing to prepare, you are preparing to fail.
You never know what motivates you.
Problems are not stop signs, they are guidelines.
Be gentle to all and stern with yourself.
The wise does at once what the fool does at last.
If you think you can do it, you can.
The dog that trots about finds a bone.
Begin to be now what you will be hereafter.
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.