Go for it now. The future is promised to no one.
Be gentle to all and stern with yourself.
If you think you can do it, you can.
The dog that trots about finds a bone.
I can, therefore I am.
Know or listen to those who know.
Be kind whenever possible. It is always possible.
It's always too early to quit.
Things do not happen. Things are made to happen.
You never know what motivates you.
The history of astronomy is a history of receding horizons.
Equipped with his five senses, man explores the universe around him and calls the adventure Science.