In the beginning, Adam was the first gardener! Even the Garden of Eden, as perfect as it was, had to have somebody taking care of it, and God gave Adam the job of keeping the Garden and tending it. The Lord expected Man to improve on His Creation!
Gardening never ends! You've got to keep fighting the bugs, the varmints, the pests, the rot, the fungus, the mold and blights and all kinds of Devil's attacks constantly! God's Garden is constantly fighting with the Devil's garden! The Devil's garden is Hell and he's trying to transfer it to Earth and create Hell on Earth. His whole idea is to try to defeat God's plan and destroy God's Garden, God's children, but he's not going to succeed!
Life is all one big garden and one big job and one big lesson, a lot of lessons, and we're constantly learning more every day! No gardener knows everything, only God the Creator knows everything! Every gardener has to study and learn from other gardeners and from God the Creator, the Head of the Estate, the Owner of the Garden, the One Who made it! We have a lot left to learn and enough work to keep us busy from now to Eternity!