Life is brief.
"As for man, his days are like grass; As a flower of the field, so he flourishes. When the wind has passed over it, it is no more, And its place acknowledges it no longer." Ps. 103:15, 16
"As for the days of our life, they contain seventy years, Or if due to strength, eighty years; Yet their pride is but labor and sorrow; For soon it is gone and we fly away." Ps. 90:10
Death is certain.
"...it is appointed for men to die once and after this comes judgment." Hebrews 9:27
"Therefore, just as through one man sin entered into the world, and death through sin, so death spread to all men, because all sinned,"
Hell is real.
"And he cried out and said, 'Father Abraham, have mercy on me, and send Lazarus so that he may dip the tip of his finger in water and cool off my tongue, for I am in agony in this flame."
"Then He will also say to those on His left, 'Depart from Me, accursed ones, into the eternal fire which has been prepared for the devil and his angels;" Matthew 25:41
Eternity is forever.
"...the Lord Jesus will be revealed from heaven with His mighty angels in flaming fire, dealing out retribution to those who do not know God and to those who do not obey the gospel of our Lord Jesus. These will pay the penalty of eternal destruction, away from the presence of the Lord and from the glory of His power."
II Thessalonians 1:7b-9
"And the devil who deceived them was thrown into the lake of fire and brimstone, where the beast and the false prophet are also; and they will be tormented day and night forever and ever." Revelation 20:10