A Basic Definition of Spirituality (of True Faith)

[The Grand Nudger]

“I don't think it surprises any rational person that there are gaps in our knowledge. It often surprises me what people want to cram in them, though. I also wonder why people who believe in spiritual whatsits would want to erect a wall between their beliefs and rational ones. I'd say think it through....more carefully..but considering the aim...
 
At any rate, what you're describing with a set of practices given to people by some authority figure would likely be called a religion, not spirituality.”
 

1) I don’t believe in a “God of the Unknown” as Neil Degrasse Tyson defines it. Scientific knowledge + the act of learning are extremely valuable for us. But I’m almost sure that if I was immortal, and kept living for several lifetime the way I’M living this lifetime I still would not be any closer to understanding “The Truth”.

Consider how much of a tragedy that would actually be.  Really.  You seem like a smart guy.  
 

2) Yes but I believe that all religions actually started as methods of spiritual enlightenment and then degenerated into repetitive dogmatic types of behaviors that are completely useless in spiritual terms.

Have you spent much time assessing whether your own ideas about "spirituality" have crossed that same rubicon...degenerating into your "religion"....? Completely useless in spiritual terms......
 

- The main methods of true spirituality are universal in most cases.

.....this wasn't addressed to me, but it's just a perfect prompt.  So, when I say that your "spirituality" sounds more like "religion" and you respond to others about the universality of the subjective experience of spirituality I see an opening for agreement.  I would consider spirituality a universal phenomena as well.  However, it's universality in the specifics is exactly the dividing line between religion and spirituality.  Spirituality being the subjective apprehension of a sense of the numinous, of connectedness, of meaning-as-such, and the awe..the altered perception... that it inspires within us.  A fundamentally subjective experience.  Religion, in contrast, is a method devised by a community meant to constrain and give structure to the raw experience, to unify it with history and (expectations, hopes, demands of) future... to utilitarian ends.  

So, when you say as you said above that all spirituality devolves(d) into religion I'm left with a very amusing picture.  That of this raw but impenetrable (???) experience being made less somehow by any attempt to make a world more concordant with the same. To give it a theological interpretation that expresses my amusement...maybe god is love...but even if that were true trying to make the world love is degenerate, and completely useless.

In spiritual terms, ofc.