Good Friday

Good Friday is a Catholic holiday in which Catholics are to fast and abstain from eating meat. What makes this especially noteworthy, however, is that when combined with priestly celibacy, it results in a perfect description, Biblically, of those who would fall away from God.

Forbidding to Marry or Eat Foods Are Doctrines of Devils
According to 1 Timothy 4:1-5, forbidding to marry and commanding to abstain from foods would be the two signs of those who'd departed from the faith, giving into seducing spirits and devil doctrines, hypocrites.

1 Timothy 4:1-5 Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils; Speaking lies in hypocrisy; having their conscience seared with a hot iron; Forbidding to marry, and commanding to abstain from meats, which God hath created to be received with thanksgiving of them which believe and know the truth. For every creature of God is good, and nothing to be refused, if it be received with thanksgiving: For it is sanctified by the word of God and prayer.

It is difficult to find a better example than Catholicism of departing from the Christian faith by forbidding to marry and commanding to abstain from foods.

Fasting
Is fasting really going to bring one closer to God? God told the Jewish leaders thousands of years ago that God does not desire such a fast, a "day for a man to afflict his soul," rather the fast God desires is to loose the bands of wickedness, undo heavy burdens, free the oppressed, break all yokes, feed the hungry, shelter the poor, and clothe the naked. God furthermore said those fasting and mourning did not do so for God but for themselves; that what God personally desired was executing true justice, mercy, and compassion rather than oppressing the widows, orphans, immigrants, and poor.

Isaiah 58:3-7 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. 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. Is it such a fast that I have chosen? a day 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? Is not this the fast that I have chosen? to loose the bands of wickedness, to undo the heavy burdens, and to let the oppressed go free, and that ye break every yoke? 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? Zechariah 7:4-14 Then came the word of the LORD of hosts unto me, saying, Speak unto all the people of the land, and to the priests, saying, When ye fasted and mourned in the fifth and seventh month, even those seventy years, did ye at all fast unto me, even to me? And when ye did eat, and when ye did drink, did not ye eat for yourselves, and drink for yourselves? Should ye not hear the words which the LORD hath cried by the former prophets, when Jerusalem was inhabited and in prosperity, and the cities thereof round about her, when men inhabited the south and the plain? And the word of the LORD came unto Zechariah, saying, Thus speaketh the LORD of hosts, saying, Execute true judgment, and shew mercy and compassions every man to his brother: And oppress not the widow, nor the fatherless, the stranger, nor the poor; and let none of you imagine evil against his brother in your heart. But they refused to hearken, and pulled away the shoulder, and stopped their ears, that they should not hear. Yea, they made their hearts as an adamant stone, lest they should hear the law, and the words which the LORD of hosts hath sent in his spirit by the former prophets: therefore came a great wrath from the LORD of hosts. Therefore it is come to pass, that as he cried, and they would not hear; so they cried, and I would not hear, saith the LORD of hosts: But I scattered them with a whirlwind among all the nations whom they knew not. Thus the land was desolate after them, that no man passed through nor returned: for they laid the pleasant land desolate.