I heard the following quote: "A rocket to the moon spends only 7% of the time on the correct course, the rest of the time it is off course and needs to be corrected and put back on course."
This is a nice anecdote in relation to how important it is to keep correcting your own course in life, have a destination in mind but keep checking if you are on course and correct.
Examples of similar quotes:
The Apollo moon rockets were off course 97% of the time. Yet they still reached their chosen destinations – and returned to earth – with pin-point precision and timing.
Did you know that an Apollo rocket is actually on course only two or three percent of the time? At least 97% of the time it takes to get from the earth to the moon, it’s off course. Put another way, for every half hour the ship is in flight, it is on course for less than sixty seconds.
Source: Better Networker
They are nice examples but are they really true. Where would these percentages come from?