CLXV. Know thou that every hearing ear, if kept pure and undefiled, must, at all times and from every direction, hearken to the voice that uttereth these holy words: "Verily, we are God's, and to Him shall we return." The mysteries of man's physical death and of his return have not been divulged, and still remain unread. By the righteousness of God! Were they to be revealed, they would evoke such fear and sorrow that some would perish, while others would be so filled with gladness as to wish for death, and beseech, with unceasing longing, the one true God -- exalted be His glory -- to hasten their end. (345:1)
Death proffereth unto every confident believer the cup that is life indeed. It bestoweth joy, and is the bearer of gladness. It conferreth the gift of everlasting life. (345:2)
As to those that have tasted of the fruit of man's earthly existence, which is the recognition of the one true God, exalted be His glory, their life hereafter is such as We are unable to describe. The knowledge thereof is with God, alone, the Lord of all worlds.
Gleanings from Writings - Bahá'u'lláh