The difference between perseverance and obstinacy is that one often comes from a strong will,

and the other from a strong won't.

Henry Ward Beecher

忍耐と強情の違い

Study as if you were going to live forever; live as if you were going to die tomorrow.

Maria Mitchell

Live as if you were to die tomorrow. Learn as if you were to live forever.

　Gandhi

You can complain because roses have thorns, or you can rejoice because thorns have roses.

Tom Wilson