I know no study that will take you nearer the way to happiness than the study of nature - and I include in the study of nature not only things and their forces, but also mankind and their ways, and the moulding of the affections and the will into an earnest desire not only to be happy, but to create happiness.

We differ, blind and seeing, one from another, not in our senses, but in the use we make of them, in the imagination and courage with which we seek wisdom beyond all senses.

You will succeed if you persevere; and you will find joy in overcoming obstacles.

Look the world straight in the eye.

Christmas Day is the festival of optimism.

If we spend the time we waste in sighing for the perfect golden fruit in fulfilling the conditions of its growth, happiness will come, must come. It is guaranteed in the very laws of the universe. If it involves some chastening and renunciation, well, the fruit will be all the sweeter for this touch of holiness.

It is with a kind of fear that I begin to write the history of my life.