"Fate permitting" is a standard Stoic phrase meant to remind ourselves that planning things is up to us, but the ultimate outcomes are not under our control. It helps us to develop an attitude of equanimity toward the universe. We should very much try to change things for the better, that's the whole point of the Stoic discipline of action.

I believe Stoicism can help anyone who takes it seriously and begins to practice it. It will help them flourish because it will provide them with a compass for navigating life, a general, flexible, framework to set priorities, and a set of techniques to achieve serenity and equanimity.

There are clearly people for whom Stoicism immediately "clicks," it comes natural, and others for whom it doesn't. Then again, Stoicism isn't the only positive philosophy of life. Buddhism is an excellent alternative, if it speaks more clearly to one's personality or cultural background.

If you are a Christian, you can still practice Stoicism and think of the Logos as the Word of God. If you are a secular person, an agnostic or an atheist, you may treat the Logos as "Einstein's god," that is the factual recognition that the cosmos is ordered according to rational principles, without which science itself wouldn't be possible.

"Fate permitting" is a standard Stoic phrase meant to remind ourselves that planning things is up to us, but the ultimate outcomes are not under our control. It helps us to develop an attitude of equanimity toward the universe. We should very much try to change things for the better, that's the whole point of the Stoic discipline of action.

Death itself is a natural occurrence, it is unavoidable, and the Stoics thought that part of philosophical practice is to get comfortable with the unavoidable, learning to face it with courage.

I can't speak for others, but I find the fundamental idea that a life worth living is one during which one strives every day to become a better person to be compelling.