To abstain from things is to over-estimate their power and this is due to the veil that hides God from you; for if you contemplated Him in things (as they arise), or before or after, they would not hide Him from you.
It is because you are preoccupied with things that God is hidden from you by them; if you saw their existence as flowing from Him, their existence would not hide you from Him.
The only thing that comes between you and Him whom you worship is joy in what you have and regret for what you do not have; the only thing that separates you from bliss is this faulty quality.
- al Darqawi
Letters of a Sufi Master