Yesterday I was clever, so I wanted to change the world.
Today I am wise, so I am changing myself. - Rumi
 
Be yourself - but... always (be) your better self. - Karl G. Maeser

Go to bed smarter than when you woke up. - Charles Munger

Loneliness is the poverty of self,
Solitude is the richness of self. - May Sarton

Know yourself, know your enemy.
A thousand battles, a thousand victories. - Sun Tzu

It's not what you look at that matters,
it's what you see. - Henry David Thoreau

You are who you are when nobody is watching. - Stephen Fry

It's far better to be alone than to wish you were. - Ann Landers

Find peace with yourself by accepting not only what you are,
but what you are never going to be. - Anon

You expect the worst in people (and) you'll never be disappointed. - The Good Wife