He who is not contented with what he has，would not be contented with what he would like to have.
There's only one corner of the universe you can be certain of improving，and that's your own self.
The unexamined life is not worth living.
Life is made up of little things.
From the deepest desires often come the deadliest hate.
It is not shame for a man to learn that which he knows not，whatever his age.
The important thing in life is to have a great aim，and the determination to attain it.
The supreme happiness of life is the conviction that we are loved.
The secret of change is to focus all of your energy，not on fighting the old，but on building the new.
Education is the kindling of a flame，not the filling of a vessel.
Do not do to others what angers you if done to you by others.
Every action has its pleasures and its price.
We can easily forgive a child who is afraid of the dark；the real tragedy of life is when men are afraid of the light.
We are here to add what we can you to life，not to get what we can from it.
Only a life lived for others is a life worthwhile.
Be kind，for everyone you meet is fighting a hard battle.
Difficult circumstances serve as a textbook of life for people.
Young people must equip themselves for life's duties and guard against its temptations.
Goals determine what you are going to be.
Life is painting a picture，not doing a sum.