The High Heaven is reserved for those who believed, led a righteous life, and developed their souls sufficiently.1
Those who developed their souls to a lesser degree, and those who die before age forty, go to the Lower Heaven, as close to God as their growth permits.1
Those who nourished their souls by worshiping God alone, believing in the Hereafter, and living righteously are strong enough to stay close to God and occupy the High Heaven.1
When God arrives, all humans and jinns are automatically stratified according to their degree of growth and development.1
Reciting The Key during the contact prayers establishes contact with our Creator, resulting in perfect happiness now and forever and nourishing our souls for the day we meet God.1, 2
The five daily contact prayers are the main meals for the soul; a righteous life without them gives some growth but is like living on snacks.1
The religious duties God instituted are a great gift from Him and are the nourishment our souls need to grow and develop.1
Without nourishing our souls through the religious duties, we cannot survive the immense energy of God's physical presence on the Day of Judgment.1, 2
To keep this commandment, believers must establish habits that guarantee God occupies their minds more than anything else, and the Quran helps establish such habits.1
A person who dies before 40 goes to the High Heaven if he or she believed in God and nourished and developed the soul, and to the Lower Heaven otherwise.1
Happiness belongs exclusively to the soul and depends totally on the soul's growth, so material success often belongs to an unhappy person.1, 2