It was from the book I learned of Toastmasters Club and how beneficial it is. The book is centered on positioning and preparing yourself for the success you seek. Just like the title says, dig your well before you'll need to draw water from it.
I meet a lot of people who don't try to do some sowing before attempting to reap. My email inbox is filled with marketing emails from people I don't know. They want me to buy this and that. They talk about "too good to be true offers" and expect me to jump at them. They don't send you any useful information without trying to sell you something. Every week you get a Whatsapp and BBM broadcast from them.
These are people who won't do anything unless there is an obvious, often immediate, gain in it for them. They don't do anything for free unless they've figured out how to monetize it. They won't be friends with you unless they can gain something from you. They won't learn something new unless there is a financial beneficial side to it. They don't do anything from pure passion and innocent desire to contribute to the world. They are experts on how to get from the world and not how to give. Their best books are books on how to get a yes from anyone; how to get people to do what you want; how to get, get, get and get. What they miss out is that giving is a lot easier and long term assured way of getting all you need.
You have to dig your well before you're thirsty. Why should it be a well? Well, so others too can benefit. No one digs a well for just one man use. The whole house or neighborhood taps from it. And that is the more beneficial way to provide value that comes back to you.
If you need something, especially in the future, then work more on providing it for not just yourself but for everyone around you and you'll have abundance.