If you wait for perfection, you might wait too long
I guess I will take credit for this phrase (see title).
To me, it reflects a key idea behind lean-agile-scrum.
It is an idea expressed in many other ways also. Ex: The perfect is the enemy of the good, which originated in France.
I like my phrasing, because to me it has a sense of humor. It teases you. It says: “Why wait? How bad can it be if you make a mistake? You might learn something if you act. And learn much faster.” In fact, in most of our business situations, this ‘learning from real action’ is so true and so powerful.