When you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meager and unsatisfactory kind. It may be the beginning of knowledge, but you have scarcely, in your thoughts, advanced to the stage of Science.
The world is a looking-glass, and gives back to every man the reflection of his own face. Frown at it, and it in turn will look sourly at you; laugh at it, and with it, and it is a jolly, kind companion.
The common idea that success spoils people by making them vain, egotistic, and self-complacent is erroneous; on the contrary, it makes them, for the most part, humble, tolerant, and kind. Failure makes people cruel and bitter.
. . . yet do I fear thy nature; It is too full o' the milk of human kindness To catch the nearest way: thou wouldst be great; Art not without ambition, but without The illness should attend it: what thou wouldst highly, That wouldst thou holily; wouldst not play false, And yet wouldst wrongly win: