Our traditional Judaism believes that death is not the end of human existence.
Some of our tradition is obviously and unfortunately the wishful thinking of our human mind and hearts.
For example, one Midrash, speaks about a soul which, because of its sins, is in Gehinnom." The Midrash says , "When people pray for mercy for that soul, the soul is thrown out of "Gehinnom" like an arrow shot from a bow." This is Tanchuma, beginning of Parshat Haazinu.
That is a comforting concept, but it has no basis in our Jewish Holy scriptures.
Nothing in our Holy Scriptures indicates such absolution.
There is clear evidence in the Torah about our soul's existence after death. The Torah indicates that the righteous will be reunited with their loved ones after death, while the wicked will be excluded from this reunion. The Torah tells us that when Abraham, Isaac and Jacob died, they were gathered to their people and that certain sins such as refusing to be circumcised or doing occupational work on the Shabbat, are punished by the sinner being cut off from his people.
In the book of Daniel we are told that many of those who sleep in the dusty earth will awaken to Gan Eden, everlasting life, or Gehinnom, everlasting rejection and horror.
Belief in resurrection of the dead is one of Rambam's 13 Principles of Faith. The Shemoneh Esrei prayer, contains several references to resurrection.
The resurrection of the dead will occur when Moshiach returns, a time referred to in Hebrew as the Olam Ha-Ba, the World to Come, but that term is also used to refer to the spiritual afterlife. When Moshiach comes to initiate the perfect world of peace and prosperity, the righteous dead will be brought back to life.
In the Mishnah, one rabbi says, "This world is like a lobby before the Olam Ha-Ba. Prepare yourself in the lobby so that you may enter the banquet hall."
But how can we prepare ourselves? Which of us has never once lied, spoken dishonorably to our parents, or desired something that was not ours? We have broken the ten commandments, the most basic of G-d's laws.
G-d called for us to do blood sacrifices in the temple to atone for our sins. There is no temple now, so we say we will fast. Not all of our rabbis tell us that fasting will forgive our sins. Fasting is not G-d's substitute for sacrifice. It is some rabbis'. G-d did not change his mind about his requirement of a sacrifice as the atonement for sin.
The Brit Chadasha, tells us he didn't need to because he had loved us so much that he sent Yeshua his only son so that whoever believed in him would not receive the rejection and horror spoken about in Daniel, but would have everlasting life.
Isn't it time you asked the G-d of Abraham, Isaac and Jacob, if Yeshua is the Moshiach?