All my life through, the new sights of Nature made...

I have frequently been questioned, especially by women, of how I could reconcile family life with a scientific career. Well, it has not been easy.

Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less.

Life is not easy for any of us. But what of that? We must have perseverance and above all confidence in ourselves. We must believe that we are gifted for something and that this thing must be attained.

Youth is the gift of nature, but age is a work of art.

He who is of calm and happy nature will hardly feel the pressure of age, but to him who is of an opposite disposition youth and age are equally a burden.

The stars shall fade away, the sun himself Grow dim with age, and nature sink in years, But thou shalt flourish in immortal youth, Unhurt amidst the wars of elements, The wrecks of matter, and the crush of worlds.

To be happy, we must be true to nature and carry our age along with us.