Our hope is found in such scriptures as:
1 Thess 4:13-18 But we do not want you to be uninformed, brothers about those who are asleep, that you may not grieve as others do who have no hope. For since we believe that Jesus died and rose again, even so through Jesus, God will bring with him those who have fallen asleep. For this we declare to you by a word from the Lord, that we who are alive, who are left until the coming of the Lord, will not precede those who have fallen asleep. For the Lord himself will descend from heaven with a cry of command, with the voice of an archangel, and with the sound of the trumpet of God. And the dead in Christ will rise first. Then we who are alive, who are left, will be caught up together with them in the clouds to meet the Lord in the air, and so we will always be with the Lord. Therefore encourage one another with these words.
Is 11:6-9 The wolf will live with the lamb, the leopard will like down with the goat, the calf and the lion and the yearling together; and a little child shall lead them. The cow will feed with the bear, their young will lie down together, and the lion will eat straw like the ox. The infant will play near the cobra's den, and the young child will put its hand into the viper's nest. They will neither harm nor destroy on all my holy mountain, for the earth will be filled with the knowledge of the Lord as the waters cover the sea.
Rev 21:1-7
Our assurance is that our God is Yahweh, the covenant LORD who keeps his word, with who there is no shadow of turning. Nu 23:19 God is not a man that he should lie, or a son of man the he should change his mind. Has he said, and will he not do it? Or has he spoken, and will he not fulfill it?
John6:39 And this is the will of him who sent me, that I shall lose none of all those he has given me, but raise htem up at the last day.