In the beginning when it all began, when God created all things, He created Adam and Eve. He placed them in a garden and gave them the job of tending it. And God looked and saw everything was good. And He blessed it.
Work was right. Work was good. This was a form of worship. As man worked he showed his dependence on his Creator for all he had and was given. This pleased God and even today it pleases God.
When Adam and Eve listened to the serpent and sinned, even then, God had man work for the things that He, God, their Creator, gave them. Now it was not to be a pleasure to work but a hardship. Work was not going to produce all it used to. Man was now going to have aches and pains.