“Jesus said to him, If you can believe, all things are possible to him who believes” (Mark 9:23).

The key to receiving your miracle or the desires of your heart from the Lord Jesus Christ is to simply believe Him and His Word! All through the Bible that is the main theme God Almighty and The Lord Jesus Christ wanted for us to believe and trust with all our heart. Once you have a personal relationship through prayer, the Word and intimate fellowship with Him it becomes easier and greater every day to believe and trust Him. The more time you spend with Him the more you believe and trust Him.

Looking unto Jesus, the author and finisher of our faith, who for the joy that was set before Him endured the cross, despising the shame, and has sat down at the right hand of the throne of God.
(Hebrews 12:2)

When you believe Him you are surrendering your free will completely over to Him and you are acknowledging your complete trust in Him as your Lord God and Savior.

Casting the whole of your care [all your anxieties, all your worries, all your concerns, once and for all] on Him, for He cares for you affectionately and cares about you watchfully.
(1 Peter 5:7 Amplified Bible)

The Lord Jesus Christ would ask people to only believe Him so He could perform their miracle. Faith and belief are the same, both mean to trust and rely on Him. God created you to fellowship and Love Him continuously. When you do, He will inhabit and dwell in your Praise of Him.

Jesus said to him, You shall love the LORD your God with all your heart, with all your soul, and with all your mind. This is the first and great commandment.
(Matthew 22:37-38)
Cast your burden on the Lord [releasing the weight of it] and He will sustain you; He will never allow the [consistently] righteous to be moved (made to slip, fall, or fail).
(Psalms 55:22 Amplified Bible)
And when He had come into the house, the blind men came to Him. And Jesus said to them, Do you believe that I am able to do this? They said to Him, yes, Lord.
(Matthew 9:28)
The time is fulfilled, and the kingdom of God is at hand. Repent, and believe in the gospel.
(Mark 1:15)
Therefore I say to you, whatever things you ask when you pray, believe that you receive them, and you will have them.
(Mark 11:24)
And these signs will follow those who believe: In My name they will cast out demons; they will speak with new tongues; they will take up serpents; and if they drink anything deadly, it will by no means hurt them; they will lay hands on the sick, and they will recover.
(Mark 16:17-18)