why

“ ‘Why have we fasted, and you see it not?  Why have we humbled ourselves, and you take no knowledge of it?’  Behold, in the day of your fast you seek your own pleasure, and oppress all of your workers…. 

‘Is not this the fast that I choose; to loose the bonds of wickedness, to undo the straps of the yoke, to let the oppressed go free, and to break every yoke?  

Is it not to share you're bread with the hungry and bring the homeless poor into your house, when you see the naked, to cover him, and not to hide yourself from your own flesh?  

Then shall you right break forth like the dawn, and you healing shall spring up speedily; your righteousness shall go before you; the glory of the Lord shall be you rear guard.  

Then you shall call, and the Lord will answer; you shall cry, and he will say, “Here I am.” If you take away the yoke from your midst, the pointing of the finger, and speaking wickedness, 

if you poor yourself out for the hungry and satisfy the desire of the afflicted, then shall your light rise in the darkness and your gloom be as the noonday.  

And the Lord will guide you continually and satisfy your desire in scorches places and make your bones strong; and you shall be like a watered garden, like a spring of water whose waters do not fail.  

And your ancient ruins shall be rebuilt; you shall raise up the foundations of many generations; you shall be called the repairer of the breach, the restorer of streets to dwell in.’"  
-Isaiah 58