Salvation is the fundamental block of current Christianity. Its literal meaning is to cover or hide. In religious terminology, it means Jesus gave his life through crucifixion as a sacrifice, hence covered for all sins committed by children of Adam. He gave up his life and rid humanity of the burden of Original Sin.

The Encyclopaedia Brittanica explains Salvation as follows:

According to Christianity, salvation is referred to as that sacrifice of Jesus that makes a sinful man turn instantly toward God. This belief has two hypotheses; first one being Adam’s sin making man distant from God. Second one is that attribute of conversation (the son) was given to humans so that he could help people regain closeness to God.

TRUE INCIDENT OF ADAM AND EVEN IN THE LIGHT OF QURAN

There is no doubt in the fact that Allah forbade Adam to eat the particular fruit that he ate. That is when He removed him from heaven and sent him to the earth. Adam was ashamed of his act so he asked for Allah’s forgiveness. Allah forgave him. This is how this incident is mentioned in the Quran:

And We ordained: ‘O Adam, reside you and your wife in this Paradise and eat of it, both of you, whatever you like and from wherever you will. But do not go near this tree lest you should (join) the transgressors. Then Satan shook them from that place, and removed them from the (blissful) location where they were. And (eventually) We ordained: ‘Go down (and live in the earth); you will remain enemies to each other, and now in the earth you have been destined a dwelling place and sustenance for a fixed time.’ (2:35-36)

Then Adam learnt some words (of humility and repentance) from his Lord. So Allah accepted his repentance. Surely, He is the One Who is Most Relenting, Ever-Merciful. (2:37)

These verses confirm that Adam sought forgiveness and Allah forgave him. So basically, the belief of salvation in Christians is self-appointed. Allah is The Most Merciful. He always acknowledges a seeker’s purely intended repentance. Adam himself prayed to Allah:

Both of them submitted: ‘O our Lord! We have wronged our souls. And if You do not forgive us and have mercy on us, we shall certainly be amongst the losers.’ (7:23)

MAN IS FREE TO CHOOSE GOOD OR BAD

The matter at hand is whether a person is free to choose between doing good or committing sins. Allah has granted humans the choice to follow any path they wish – whether to engage in righteous deeds and attain paradise or commit sins and face the flames of hell that are inscribed in their portion. Allah has given man free will.

And that man (according to justice) will get only that for which he strives. (As for bounty, no one has any right to it. That is merely Allah’s bestowal and pleasure, granting as much as He wills to whom He pleases.) And that all his endeavors will soon be shown (i.e., exposed). Then he will be given full reward (for all his endeavors); (53:39-41)

THE UNIVERSAL NATURE OF THE PROPHETHOOD OF PROPHET MOHAMMAD (PBUH)

If an examination of the Islamic religion is conducted, it is evident that the Quran affirms that Allah appointed Prophet Isa (Jesus) as a prophet specifically for the Bani Israel. Moreover, including Prophet Isa, all the prophets, including those who came before, have given glad tidings of the arrival of Prophet Mohammad as the final prophet in the world.

Some references are as follows:

Prophet Isa (Jesus) said, ‘As long as I do not depart from this world, the Comforter will not come to you. But when I go, I will send him to you. And when he comes, he will give guidance about sins, walk the straight path, and administer justice.’ (12:7-8)

Here, “comforter” could only mean Prophet Mohammad since he is the one who came after the ascension of Prophet Isa. 

Prophet Isa said, “I will pray to Allah to send you a soother who will always stay with you.” (John -12-13)

This prophecy is only true for Prophet Mohammad because he came as the last Prophet with a comprehensive message for the entire world. His prophethood and the message of the Quran are eternal.

The Gospel of Barnabas mentions:

Jesus responded, “Truth is, Allah promised as such, but I am not him. Because he was born before me but he will come after me.”

“The one who will come from the South with power, and destroy all idols and idol worshippers.”

“But my reassurance lies in the coming of that Prophet who will dispel all false notions about me, spread his faith, and become widespread throughout the world. Because Allah has promised this through our beloved Ibrahim.”

All this concludes the fact that the prophet he talked about is in fact Mohammad (pbuh).

PREVIOUS MESSENGERS WERE ONLY FOR A SPECIFIC NATION

All the messengers Allah sent were assigned to an umma.

Their prophethood was temporary. However, Prophet Mohammad’s prophethood is eternal and for all. He is the last link of the chain of prophets. No one can claim to be Muslim who denies his prophethood and the Quran that was revealed to him. Ultimate success in both the worlds is achieved only by following Islam.

Allah says:

And, (O Esteemed Prophet,) We have not sent you but as a Bearer of the glad tidings and as a Warner to the entire mankind, but most people do not know. (34:28)

The message of Islam is universal and the prophet’s guidance is for all mankind. He came to complete sharia.

“Quran is not except a reminder to the worlds.” (12:104)

Hadith states:

Every apostle was sent particularly to his own people, whereas I have been sent to all the red and the black the spoils of war have been made lawful for me” (Muslim 1163)