Well, with the caveat that there are plenty of things I can't define or quantify that I wouldn't regard as particularly "spiritual", I'll buy that. Part of the problem is quantifying or defining the oft-misused word "spiritual" itself. If you'd regard it as subjective responses to art, nature, music, and so on that provide edification through joy as well as knowledge, a synergy of experience and personal response, that would do me. As long as I'm allowed to stop there and enjoy the reverie without having a divine bolt-on suggested to me. I never really feel I have to say thank you to anyone when I've enjoyed a "spiritual" moment or two.