This is the foundation of scientific study: Not searching to prove your hypothesis right, but asking how it can be proven wrong. Of course, I could be wrong too.
If a soul or spirit exists after we pass, we shall find out soon enough. On the other hand, if there is no God and there is no afterlife, consider this: we spent billions of years NOT being born and NOT being alive, and was that such a horrible experience?
There are many beliefs about God that are often contradictory to each other. There is no evidence that your God is the right one. Moreover there is no evidence that there is any God at all.
[World] Discovering the true nature of reality requires one to question, probe and test all things with a skeptical attitude and take nothing for granted. Seekers of truth must take joy in being proven wrong because ultimate truth is more important for the collective society than
Personal sovereignty = a person's right to choose what happens to their own body. Complete respect of personal sovereignty means no rape, no murder, no abuse. It means free speech and movement. It means anyone is free to do what they will safely without imposing on others.
Where else do critical thinking and ethical behaviour begin, but by asking questions? The words what, why, who, how, where, and when are the beginning of knowledge, wisdom, science and most importantly, ethics. Can you treat your neighbours well without knowing their needs?
Live happily: What better feeling is there than to smile or to get someone else to smile? Love broadly: People think differently, respect that. Think critically: ensure your actions are moral and you don't blindly follow others or believe non-evidence-based theories.