Do you desire security? Here you have it. The Lord says to you, "I will never abandon you, I will always be with you." If a good man made you such a promise, you would trust him. God makes it, and do you doubt? Do you seek a support more sure than the word of God, which is infallible? Surely, He has made the promise, He has written it, He has pledged His word for it, it is most certain.
Desire only God, and your heart will be satisfied.
If God seems slow in responding, it is because He is preparing a better gift. He will not deny us. God withholds what you are not yet ready for. He wants you to have a lively desire for His greatest gifts. All of which is to say, pray always and do not lose heart.