Maslow talks about self-actualisation along with the current multitudes of coaching gurus. There are others who talk about self-transcendence. I'm in the latter camp. Were we able to fully self realise, let's be honest, who ever does? Can one lifetime of opportunities and mistakes ever be enough time to fully self-actualise? I doubt it and I've never met anyone who feels they've achieved this. (This is not the same as being at peace with life and oneself either!)
Self-transcendence is the route that leads us higher, higher than ourselves. My friend loves to say, "Aim at nothing, you'll hit it every time!" to propel us to think of the opposite, "Aim high and you have a chance of achieving something at least". Aiming beyond ourselves will lift us to a higher realisation of self and life than we currently experience.
So what is that which is higher than I? Or as the Psalmist says, "lead me to the rock which is higher than I". It has to be something bigger, loftier, more profound, way better than the self I currently am. And lets add to that, something that isn't just an abstract construct that is impersonal, remote and therefore unattainable. For me it's a no brainer as to what that is!