Since nicolaou is still waiting for that answer to the initial question of the thread, here goes...
A few years ago I was interested in existentialist solutions to the meaning of life. It's commonly an atheistic perspective on life associated with philosophers such as Nietzsche, Sartre and Camus, but also the Christian philosopher Kierkegaard and to some extent the philosopher Heidegger who was a practising Catholic (among other things). I especially liked Camus' emphasis on the absurd nature of the human condition and the position we humans find ourselves in. We are in a world without inherent meaning and yet we seem doomed to strive constantly as if there is a point to it all.
Sartre said we are forced to choose how we will respond to our situation, there is a compulsion. This predicament can at times cause an uncomfortable sensation like nausea. As, for example, when we are at the top of a cliff, looking down, there is sometimes an absolute realisation that we can choose to fall or we can choose not to fall. The choice is utterly ours, and we cannot say there is no choice. We must choose, gladly, most often, the choice we make is not to fall. But the lesson is that all of life can be likened to that extreme choice. And when we realise this, there is the sense of nausea. We must choose what to make of our lives: whether and with what to inscribe it with meaning. Faced with the absurdity of a world without inherent meaning, we cannot avoid this choice.
Nietzsche discounted heaven and hell as providing ultimate meaning, but he did teach what is called the "eternal return". This is the idea that when we die we go back to the beginning and live our life again, exactly the same, and again, and again, eternally. Some have said these comments by Nietzsche were a result of mental illness toward the end of his life and not to be taken seriously. Others have said it's a metaphor to live your life by: if you approach life as if it is going to be repeated eternally you may choose to get up out of bed earlier, not bicker needlessly, do something worthwhile, something authentic, instead of making inauthentic choices leading to time spent tediously and pointlessly.
Authenticity is a key idea for existentialist writers, and promoted as the goal for a life filled with meaning of our own making. And it's easy to see how the idea of authenticity is an appealing concept for former JWs who have often struggled with authenticity when breaking from the JW religion. As a recent author has said, living a fake life is simply bad for you.
https://www.theguardian.com/lifeandstyle/2016/sep/25/why-being-a-fake-is-bad-for-you
However in the past few years I have come to doubt the wisdom of inscribing our lives with individual meanings. Maybe we don't need to find life inherently absurd, and there is an alternative to simply making the best of it as individuals as we can,