3 Bible Verses about Overcoming Discouragement

I have said all this to you that in me you might have peace. In the world you will have tribulation, but be courageous; I have overcome the world."

Now the confidence which we have in him is this, that he listens to us whenever we ask anything that is in accordance with his will.

"Peace I leave with you. My own peace I give to you. It is not the world's 'Peace' I give you. Let not your heart be troubled, neither let it be afraid.