This question should not be asked. If you know God exists, you know it. If you don’t, it is no way to convince you otherwise. It will be only you to convince yourself. All these debates about God existence are entirely not justified.
The question that should be asked is: How do we know God exists? And on the other side, an atheist’s hand: How do we know God does not exist? We could say we have different perspectives. We know there is a God, we feel it with our all being, and we feel that strong connection that cannot be broken. Events and people in this complex equation of the Universe and beyond, synchronicity how Car Jung called it, this concept which holds that events are “meaningful coincidences” if they occur with no causal relationship, yet seem to be meaningfully related, are creating a great feeling of knowingness, and relation to God. Again this is not a debate. All that was said is for all of us who remember God. We shouldn’t judge the other category because it is nothing wrong with them either. They may remember God at some point they may not, it is their own way and their own path. We should love them the same. Imagine we get married and later in life, we have this shift, this spiritual awakening but our partners do not agree with us. Do we reject them? How could we? We love them as we did before. We may say that they are blind and actually do not love us without seeing God within us. Even so, was not Jesus saying “It is easy to love the one who loves you back, but is no reward in that”? We cannot be spiritually selfish, creating this spiritual world around us and reject others. That will defeat the purpose of spirituality itself.
Same on the other side. We may be upset with our partners for believing in God and be so upset how they can do that. For us, the atheists it is clear there is no God. But then why with be a problem if we love them.
Basically, it is obvious, love is the bound in between people, and not beliefs. But on the other hand, what is love, can we call it God?