In the Odyssey by Homer, the main idea would be a life's journey that is filled with obstacles. Odysseus has been at war for ten years and now he has spent ten years trying to get home. The journey has been long and full of trials, tribulations and obstacles.
Odysseus encounters the Cyclops, the Sirens, Circe, Calypso, etc. He has to overcome each obstacle. Daily, it is a battle just trying to get home. He loses his crew along the way. He nearly loses his life. However, through wit, heart and sheer determination, Odysseus finally makes it home.
When he reaches his homeland, Odysseus has more obstacles to overcome. He has to take care of disloyal servants and the suitors who are trying to marry Penelope. Life is a struggle, but with determination and perseverance, the journey is possible and the end result will be worth all the difficulties one has faced.