My only two constants are to challenge myself and to try not to repeat myself.
There are three constants in life. . . change, choice and principles.
For the past several centuries the bonding power of the family dinner table has been one of the few constants, and now it's binding no more. The potency of the media is now stronger than that of the family. The wonder is that families still exist at all, since the forces of modern life mainly all pull people away from a family centered way of life.
I learned from my dad that change and experimentation are constants and important. You have to keep trying new things.
The variables vary too much and the constants aren't as constant as they seem.
I always thought I'd go to university and then get a real job, you know. Now I want to do stuff that really makes me happy. Although I'm still trying to work out what that is. But for me there are always constants.