I think many outside the Christian faith would find the idea of spirituality admirable, even desirable. It has this idea of transcending reality, and I think most would agree that reality isn't often what it should be - brokenness, pain, violence, etc. The problem is, even Christians would say that the spiritual life is elusive, and yet we have the Holy Spirit, the third member of the Godhead, to magnify the saving work of Christ in our lives (Eph 3:16-21), reminding us of the victory that is ours and a future hope to come. Consequently, we are well equipped to live for an eternity beyond this life.  The truth is, we don't feel victorious everyday. We struggle outright with sin, and with ourselves. And we crave a spirituality that transcends all of that. But the Christian faith is described as something we strive for (Heb 4:11), a race (1 Cor 9:24), and a fight (2 Tim 4:7). In other words, the spiritual life is one that is continuous, and not only that, it is met with resistance such that it won't come easily. 

I think a realistic view of sin gives us a better idea for how we are to view the Christian life, and our salvation. Spirituality, then, becomes less of this idealized, often longed for state, and rather one that sees us struggling to live holy lives in a depraved world, knowing that sin has no final victory over us (Romans 6:5-11).