Observe how possible it is to have a fondness for ordinances, but to be void of a spirit of grace in them. Outward observances are easily followed; but heart-renewing, heart-felt sorrow for sin, consists in somewhat more than these. A squalid face and sable garments, yea, abstinence from ordinary food, are no real marks of true fasting. How divinely hath the Lord Jesus dwelt upon this subject, Matthew 6:16-18.
Isaiah 58:2-7
2 Yet they seek me daily, and delight to know my ways, as a nation that did righteousness, and forsook not the ordinance of their God: they ask of me the ordinances of justice; they take delight in approaching to God.
3 Wherefore have we fasted, say they, and thou seest not? wherefore have we afflicted our soul, and thou takest no knowledge? Behold, in the day of your fast ye find pleasure, and exact all your labours.b
4 Behold, ye fast for strife and debate, and to smite with the fist of wickedness: ye shall not fast as ye do this day, to make your voice to be heard on high.
5 Is it such a fast that I have chosen? a dayc for a man to afflict his soul? is it to bow down his head as a bulrush, and to spread sackcloth and ashes under him? wilt thou call this a fast, and an acceptable day to the LORD?
6 Is not this the fast that I have chosen? to loose the bands of wickedness, to undo the heavyd burdens, and to let the oppressed go free, and that ye break every yoke?
7 Is it not to deal thy bread to the hungry, and that thou bring the poor that are cast out to thy house? when thou seest the naked, that thou cover him; and that thou hide not thyself from thine own flesh?