Blessed is the man who remains steadfast under trial, for when he has stood the test he will receive the crown of life, which God has promised to those who love him. 
-James 1:12

Have I not commanded you? Be strong and courageous. Do not be frightened, and do not be dismayed, for the Lord your God is with you wherever you go.”
-Joshua 1:9

And this is eternal life, that they know you, the only true God, and Jesus Christ whom you have sent - John 17:3

 I have said these things to you, that in me you may have peace. In the world you will have tribulation. But take heart; I have overcome the world.
-John 16:33

But now, O Jacob, listen to the Lord who created you. O Israel, the one who formed you says, “Do not be afraid, for I have ransomed you. I have called you by name; you are mine. When you go through deep waters I will be with you. When you go through rivers of difficulty, you will not drown. When you walk through the fire of oppression, you will not be burned up; the flames will not consume you.
-Isaiah 43:1-2

Jesus said, “Let the little children come to me, and do not hinder them, for the kingdom of heaven belongs to such as these.
-Matthew 19:14