Jesus taught that two things are essential to faith-entrance into the kingdom:

1. Faith, sincerity. To come as a little child, to receive the bestowal of sonship as a gift; to submit to the doing of the Father's will without questioning and in the full confidence and genuine trustfulness of the Father's wisdom; to come into the kingdom free from prejudice and preconception; to be open-minded and teachable like an unspoiled child.

2. Truth hunger. The thirst for righteousness, a change of mind, the acquirement of the motive to be like God and to find God.

Paper 170:3

“John the Revelator saw a vision of the arrival of a class of advancing mortals from the seventh mansion world to their first heaven, the glories of Jerusem. He recorded: "And I saw as it were a sea of glass mingled with fire; and those who had gained the victory over the beast that was originally in them and over the image that persisted through the mansion worlds and finally over the last mark and trace, standing on the sea of glass, having the harps of God, and singing the song of deliverance from mortal fear and death.”

Paper 47:10