My sister-in-law was a strong Baha'i and she died of liver cancer in 2001. As I recall her telling my brother, who was also a strong Baha'i, she did not want to fight the cancer and was glad she was dying because she did not want ti be around to see what was going to happen in the world. My sister died of cancer in 2004, but she did not want to die. Sorry, but I cannot reconcile an All-Loving God with all the death and suffering in the world. This is not an emotional thing, it is a logical thing. It makes no sense why a Loving God would allow so much suffering, when it did not have to be this way.
I am sorry to hear about your loss. So forgive me for commenting but I want to say something about you not being able to reconcile an all-loving God. Here's my argument why we have so much death and suffering in the World yet we still have an all-loving God. The idea has to with Apophatic theology and how we define God. God is perfect, whole, and complete. Being perfect, whole, and complete, God does not have any needs or desires. Since our needs and desires are the source of all that is evil in the World, since God has no evil, God is absolute goodness. Or in other words since God has no need or desire to judge anyone then God is All-loving.
God did not create the Universe out of some need or desire. God created the Universe out of an overflowing abundance of energy. But our Universe is not perfect, whole, and complete like God. Our Universe is full of imperfections. Nature is full of imperfections. Our human bodies are full of imperfections. It is these imperfections in the Universe, nature, and in ourselves that is the source of all our suffering. Your sister's human imperfections were the cause of her dying from cancer not God's lack of caring.
The only way God could have prevented all the suffering in the World would have been by creating each of us with omnipotent powers. Only by having omnipotent powers would we be strong enough to overcome all our imperfections. The thing is if we have omnipotent powers then we would not be separate from God. We would be one with the mind of God. We would be God. God did not create us as clones of Himself.
We were all created to fulfill our part in God's plan. And that plan is we exist to realize God's omnipotence. We exist so God can share in our experiences of having limitations by God sharing in our experiences of love, joy, frustration, suffering, and death. Every choice we make is God realizing what would happen if. I believe we live in a cyclical Universe were over an unimaginable amount of time God gets to experience every possible choice we can make.
This way of thinking seems logical to me as long as you accept the assumptions I making. You can't prove an assumption. Assumptions are chosen to be true.
My way of thinking has a really interesting twist to the Adam and Eve creation story. The story is not about sin. The story is about making peace with the tree of knowledge. Once we discover our own imperfections, we are not really cast out from Eden. We just no longer experience it. Many times when people find out they were created with imperfections we turn to our creators and hate them. We hate our creators because they are responsible for all our weaknesses. And our weaknesses are the source of all our suffering. We love our parents for their strengths. But we hate our parents for their weaknesses. This is because our parent's strengths are our strengths. Our parent's weaknesses are our weaknesses. It's only when we accept who we are and love ourselves in spite of our own imperfections that we are able to have a good relationship with our parents.
The same is true for God. We love God for our strengths. We hate God for not creating us with omnipotent powers. We have to stop judging God. Until we make peace with the tree of knowledge, that is, make peace with our own imperfections in ourselves, the people around us, nature, the Universe we will not be capable of fully loving and appreciating all of God's blessings flowing all around us. Once we make peace with the tree of knowledge we are able to experience again some of the good parts of Eden we lost when we were expelled.