Zeal is born of hope Reference Page

Where there is hope, there is optimism.
Reference: Acts 24:15 15having a hope in God, which these men cherish themselves, that there shall certainly be a resurrection of both the righteous and the wicked.

No one can be zealous about what he believes is a hopeless situation.
Reference: Romans 14:22 22The faith which you have, have as your own conviction before God. Happy is he who does not condemn himself in what he approves.

Enthusiasm is born of believing you are going to win.
Reference: John 3:16 16"For God so loved the world, that He gave His only begotten Son, that whoever believes in Him shall not perish, but have eternal life.

If you really believe, that you are going to walk on streets of gold in God's Everlasting Kingdom, you will be filled with enthusiastic hope.
Reference: 2 Corinthians 5:1 The Temporal and Eternal 1For we know that if the earthly tent which is our house is torn down, we have a building from God, a house not made with hands, eternal in the heavens.

If you believe it is certain, that the work, God gave you to do, is going to abound in victory, you will be zealous.
Reference: John 14:12 12"Truly, truly, I say to you, he who believes in Me, the works that I do, he will do also; and greater works than these he will do; because I go to the Father.

Let Hope be your guide!
Reference: Psalm 25:5 5Lead me in Your truth and teach me, For You are the God of my salvation; For You I wait all the day.