The Buddha did it. Others have done it. I can see that it is possible. Difficult, but possible.
Did Buddha came back spiritually and say he had achieved it? But I say unto you that Christ has risen from the dead and seen by many witnesses for why Christianity and the Good News exists today and for what is coming; the end of death altogether.
1 Corinthians 15:11 Therefore whether it were I or they, so we preach, and so ye believed. 12 Now if Christ be preached that he rose from the dead, how say some among you that there is no resurrection of the dead? 13 But if there be no resurrection of the dead, then is Christ not risen: 14 And if Christ be not risen, then is our preaching vain, and your faith is also vain. 15 Yea, and we are found false witnesses of God; because we have testified of God that he raised up Christ: whom he raised not up, if so be that the dead rise not. 16 For if the dead rise not, then is not Christ raised: 17 And if Christ be not raised, your faith is vain; ye are yet in your sins. 18 Then they also which are fallen asleep in Christ are perished. 19 If in this life only we have hope in Christ, we are of all men most miserable. 20 But now is Christ risen from the dead, and become the firstfruits of them that slept. 21 For since by man came death, by man came also the resurrection of the dead. 22 For as in Adam all die, even so in Christ shall all be made alive. 23 But every man in his own order: Christ the firstfruits; afterward they that are Christ's at his coming. 24 Then cometh the end, when he shall have delivered up the kingdom to God, even the Father; when he shall have put down all rule and all authority and power. 25 For he must reign, till he hath put all enemies under his feet. 26 The last enemy that shall be destroyed is death. 27 For he hath put all things under his feet. But when he saith all things are put under him, it is manifest that he is excepted, which did put all things under him. 28 And when all things shall be subdued unto him, then shall the Son also himself be subject unto him that put all things under him, that God may be all in all.
Of course. There are many different paths up the mountain. You do not have to be Buddhist to climb it, it is just that Buddhism has better maps of the path than some other religions.
Matthew 11:25 At that time Jesus answered and said, I thank thee, O Father, Lord of heaven and earth, because thou hast hid these things from the wise and prudent, and hast revealed them unto babes. 26 Even so, Father: for so it seemed good in thy sight. 27 All things are delivered unto me of my Father: and no man knoweth the Son, but the Father; neither knoweth any man the Father, save the Son, and he to whomsoever the Son will reveal him. 28 Come unto me, all ye that labour and are heavy laden, and I will give you rest. 29 Take my yoke upon you, and learn of me; for I am meek and lowly in heart: and ye shall find rest unto your souls. 30 For my yoke is easy, and my burden is light.
There is rest in Jesus Christ; no climbing any mountains. That is why little children are free to come to Him for all they can do is take Him at His word by trusting Him. That is how we enter in by believing in Him.
Mark 10:13 And they brought young children to him, that he should touch them: and his disciples rebuked those that brought them. 14 But when Jesus saw it, he was much displeased, and said unto them, Suffer the little children to come unto me, and forbid them not: for of such is the kingdom of God. 15 Verily I say unto you, Whosoever shall not receive the kingdom of God as a little child, he shall not enter therein.
Christians were executing heretics long before Calvin. You might want to read up about the Albigensian Crusade
Doesn't mean Jesus had taught it. That is the difference between following Jesus & His words rather than erring Christians.
Matthew 5:43 Ye have heard that it hath been said, Thou shalt love thy neighbour, and hate thine enemy. 44 But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you; 45 That ye may be the children of your Father which is in heaven: for he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust. 46 For if ye love them which love you, what reward have ye? do not even the publicans the same? 47 And if ye salute your brethren only, what do ye more than others? do not even the publicans so? 48 Be ye therefore perfect, even as your Father which is in heaven is perfect.
John 16:1These things have I spoken unto you, that ye should not be offended. 2 They shall put you out of the synagogues: yea, the time cometh, that whosoever killeth you will think that he doeth God service. 3 And these things will they do unto you, because they have not known the Father, nor me.
We are the ones to get killed, we are not to kill those who hate us. Indeed, during the coming great tribulation, believers are not allowed to kill or take captive anyone that opposes them even though He has warned everyone that taking the mark of the beast to buy & sell to survive in the new world order will go to the lake of fire. Of all times one would think you would be allowed to kill because those sinners cannt be saved that has the mark, it would be then, but no. Vengeance is His.
Revelation 13:9 If any man have an ear, let him hear. 10 He that leadeth into captivity shall go into captivity: he that killeth with the sword must be killed with the sword. Here is the patience and the faith of the saints.
So Christians killing in His name in those crusades were not doing God's service at all since they are not allowed to do it during the great tribulation.