... suddenly a White Rabit with pink eyes ran close by her. There was nothing so very remarkable in that; nor did Alice think it so very much out of the way to hear the Rabbit say to itself "Oh dear! Oh dear! I shall be too late!" (when she thought it over afterwards it occurred to her that she ought to have wondered at this, but at the time it all seemed quite natural); but when the Rabbit actually took a watch out of its waistcoat-pocket, and looked at it, and then hurried on, Alice started to her feet, for it flashed across her mind that she had never before seen a rabbit with either a waistcoat-pocket, or a watch to take out of it, and burning with curiosity, she ran across the field after it, and was just in time to see it pop down a large rabbit-hole under the hedge. In another moment down went Alice after it, never once considering how in the world she as to get out again.
- Lewis Carroll from "Alice's Adventures in Wonderland"
When you hear that by NOT estimating you can show up on time, every time, on budget, with the needed capabilities the customer paid for, in the presence uncertainties encountered on every project, you'll know that to do so you must enter the Alice in Wonderland world where those uncertainties, deadlines, not to exceed budgets are just as fanciful as that Rabbit.