“By failing to prepare, you are preparing to fail.” ― Benjamin Franklin
“Give me six hours to chop down a tree and I will spend the first four sharpening the axe.” ― Abraham Lincoln
“The time to repair the roof is when the sun is shining.” ― John F. Kennedy
“A goal without a plan is just a wish.” ― Antoine de Saint-Exupéry
You are welcome to add your favorite proverb about project management in the comment.