1Jn_4:8 He that loveth not knoweth not God; for God is love.
1Jn_4:16 And we have known and believed the love that God hath to us. God is love; and he that dwelleth in love dwelleth in God, and God in him.
2Ti 3:16 All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
2Ti 3:17 That the man of God may be perfect, throughly furnished unto all good works.
God is without fault.
Sin is to go against the principles that hold the universe in Gods love. Satan did it and was separated from God. Separation from God equals death, and Adam had a choose (free will), and choose to disobey God and handed the world to Satan. Satan is the king of this world and has corrupted it more and more but we have a choose to make Jesus our Lord and follow Him. Jesus will be given this Earth when sin is destroyed and He will recreate it new. Rev 20, 21, 22.
Suffering will continue while ever Satan is working and while ever sin is being practiced.
Rev 21:4 And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away.
Rev 21:5 And he that sat upon the throne said, Behold, I make all things new. And he said unto me, Write: for these words are true and faithful.
Rev 21:6 And he said unto me, It is done. I am Alpha and Omega, the beginning and the end. I will give unto him that is athirst of the fountain of the water of life freely.
Rev 21:7 He that overcometh shall inherit all things; and I will be his God, and he shall be my son.
Rev 21:8 But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.