What Is the Difference between Investing and Speculation?

"What is the difference between investing and speculation? At first, you think the answer is simple because the distinction is obvious — that is, until you actually put pen to paper and try to answer the question.
Go ahead; take a few seconds and think about it. Write down “investing.” Now write the definition. Do the same for “speculation.” If you are like me, frustration quickly builds because the answers do not come quickly or easily, and they should. After all, these terms have been a part of the financial lexicon since Joseph de la Vega wroteConfusion of Confusions in 1688, the oldest book ever written on the stock exchange business. In his famous dialogues, de la Vega observed three classes of men. The princes of business, called “financial lords,” were the wealthy investors. The merchants, the occasional speculators, were the second class. The last class was called the “persistent speculators” or the “gamblers.” (...)"