"You can't make an omelet without breaking a few eggs."
Old saying meaning today: The final result of your actions is more important that a few bumps in the road. Some things will not go right, but that doesn't mean that the whole picture will not be complete.
"I do not know anyone who has got to the top without hard work. That is the recipe. It will not always get you to the top, but should get you pretty near." — Margaret Thatcher, former Prime Minister