It's not mentioned in the Bible. None of the apostles observed it. Nowhere are Christians commanded to keep it. It was not even officially practiced until nearly 1000 years after Christ's resurrection. Like so many other non-biblical “Christian” customs, it has pagan roots. It's a sad fact that modern Christianity has appropriated so many customs from the practice of the heathens, that one might wonder if it should still be called Christianity.
The Norse practice which has become known as Ash Wednesday was itself, drawn from the Vedic Indian religion. Ashes were believed to be the seed Agni , the Indian fire god. It is from this name that the Latins used for fire, ignis. It is from this root word that the English language got the words, ignite, igneous and ignition. Agni was said to have the authority to forgive sins. Ashes were also believed to be symbolic for the purifying blood of the Vedic god Shiva, which it is said had the power to cleanse sins.
Lent is a period of 40 days preceding the observance of Easter, where the observers are expected to fast or cease from having the use of some other “luxury.” Like the majority of modern, so-called Christian practices, its beginning can be traced to heathen practices.
In his book The Two Babylons, Alexander Hislop observed:
In the early 19th century, German explorer Alexander von Humboldt noted the practice among the pagans in Mexico, being held in the spring. His account states:
A Lent of forty days was also commemorated in Egypt. According to by English scholar John Landseer, in his Sabean Researches (1823), an Egyptian Lent of forty days was held in honor of Osiris.
There is a spiritual signature which bears witness to the spirit of these traditions. It is called Fat Tuesday, Shrove Tuesday or Mardi Gras. It is the custom of living it up to get our fill of all the enjoyment the world has to offer before setting off to “Church” in mock repentance on Ash Wednesday. Such celebrations are an indication of the spirit behind the facade.
Christ made it plain in John 4:23-24:
To be sure, those who observe modern “Christian” practices are religious. They may have personal conviction, but they are missing a vital element of the faith. They are lacking truth.
The Bible tells us in chapter 9 of the book of Hebrews, that we are made clean by the shed blood of Jesus Christ. No amount of ritual or work of the hand of man can accomplish this.
1st Peter 1:13-16 tells us:
The word holy means set apart, different from the rest. If we keep traditions which are not of God, how can we be holy? From what then are we different if we do as they do?
Not everyone has the conviction nor the courage to be set apart from the rest of the world. The sad truth is that mainstream Christianity lost her way, having fallen into apostasy long ago. This apostate tradition is continued by priests, pastors and preachers, ordained not by God in the power of the Holy Spirit, but by men in the spirit of the world.
And their followers wouldn't have it any other way.