Ca. 1979 I turned from a very moderate (say watered down) version of Roman Catholicism to a secular humanist atheist. Is religion totally wasted? No, it does give some people who believe comfort and has infused language with a number of themes and expressions that can be used by everyone. And it is one of the sources/motives for human behavior. Some good. Sadly, bad also. But humanism can and will take that place! The golden rule of 'do unto others as you would have them do unto you' can work out fine. Unless you meet a masochist, in which case all bets are off... :-) It is a theme that can be found in several cultures. A decent humanistic set of memes can be found, in my opinion, in the words of the John Lennon song 'Imagine'. And I also have to think about words attributed to Christiaan Huygens, a Dutch scientist and science fiction author: 'The World is my Fatherland, Science is my Religion'. Others who inspire me are people like Carl Sagan, Isaac Asimov, Stephen King, Charles Darwin, Gene Roddenberry, Joss Whedon and Richard Dawkins. Back to my atheism. Recently I've formulated for myself a set of reasons of why I'm an atheist.
There is no evidence for anything supernatural. It's an extraordinary claim, and that requires extraordinary evidence. Hard scientific proof. There is none.
Even if there was that evidence, the question would be whether such entity or force has been identified yet. Sure, there are many religions, many gods and many interpretations. But are any of them right? They all say they are. If there is such a thing, it might as well be something unknown. Something new.
So, imagine you have proved that there is a supernatural force and that you have correctly identified it... Lore states such a being would be omnipotent and omniscient. Otherwise, what would be the point of it? If it knows everything, including every thought you think even before you think it, what would be the point of prayer or rituals? Like tricks a pet has to perform for a petty and vindictive master? "Jump through my hoops and you'll be fine"? Is it good and powerless? Why else would there be misery? Or is it bad and powerful? In which case it would certainly would not deserve our best. Sure, there's also that 'mysterious ways' meme. I'm allergic to that. See number 1. And besides all that, do they really deserve any worship? I think that if these gods really existed a fair number of them would belong in jail because a lot of them are perfectly okay with committing, or be complicit, with war- and hate-mongering, (mass)murder, genocide, rape, false imprisonment and slavery.
And what I really DO believe you can read here: What I believe.
Wouter Valentijn, 2016.