What is a spiritual life?

Is this an easy question? What actually is the meaning of "Spiritual". I have a very simple definition, but because I like to write not only out of my head, but something based of fact, what people can comprehend, I went to Wikipedia and to the Wiktionary. I grew up in a post war German which was basically free of English (at least for the average people). By browsing the Wiktionary looking for the word Spiritual I came across the religious songs basically of black American making. I am sure at least the last 10 years, probably longer, I had completely forgotten about it.
It was somehow an amazing experience. It was like browsing an old photo album and you find a picture that once meant a lot, but you had forgotten about it.
For many years I had observes it was a rare word. Then some groups like Eckankar  and others used it and more and more the word found its way back into the main stream and actually - on my impression - replaced the word religion/religious.
Let me give you my definition of spiritual: Spiritual refers to the invisible side of life, the force behind it.
For me it is a force maybe only a matrix that exists in the lives of every person, but at the same time is very personal and differs from person to person. I like to think that this spiritual matrix is based on the individual karma.

You might say say: Well, nice " And?"
Did you ever wonder why certain things in your life did not turn out as planned? Did you ever feel that you had to do a certain action, or maybe say a certain word, but you could not? Like you want to apologize to a certain person or say "I love you" to another? Live changing moment, but somehow, something held you back. Made you to stay mute, made you be an observer of an action and at the same time a puppet on the strings?
[Did you ever have such a moment? Where you were actor and observer? If so, did you ever wonder how it could be? ]
Maybe, maybe it would be sufficient to use the term karma. But maybe I am not good enough with words. Actually while writing this, I also do a lot of thinking. And this writing process now is at least as much for me it it might be for you.
I cherished the Term "Spiritual" and now in the first step I had to broaden its meaning and now, only minutes later, by linking it directly with karma, almost make it obsolete.
On one side, this makes me a little sad, like loosing something precious, but from a spiritual point of view I also see that now I can let go of something I no longer need on my journey home to God, something I have outgrown.
Maybe you too have outgrown words or images, once precious to you, but now only are a burden, often an invisible one, on your journey home to God.