Judaism does not hold that the world is sweet. We recognize that there can only be health if it is possible to be sick. There can only be happiness if there is possibility to be sad. Only the person who knows how to cry will know how to laugh. Only because we understand what death is can we appreciate what life is.
Judaism does teach the yin yang of existence. Consequently we understand that there is always the possibility of the bad just as there is always a possibility of the good. We recognize that suffering is a necessary presupposition to delight.
And so the Torah portion that we read this week teaches us about Amalek, who was by all accounts a very evil man who desired power for himself and who could care less about the sanctity of the other person. We are commanded to destroy Amalek wherever he may be found. We are further commanded to never forget that Amalek once existed or we will be forced to fight his kind again.
People are to be vigilant in the protection of their rights and blessings. They need remember that just living is not a passport for only good. Indeed, God has commanded us to make this world a better world, to bring the end of days, the time of the Messiah. In other words, God admits that the world that He gives us is not a perfect world. He tells us that we have the obligation to work to make it perfect.
We are taught how to sanctify the world, which means that the world is not holy. We are taught to create the right ecological conditions for all animals, which means that those conditions do not exist naturally.
We are taught that we have the ability to make a heaven out of any hell, but also that we have the same power to change hell into heaven.
We are commanded to remember how we can make that heaven. We are warned that hell can be a very human creation.