Mark 9:23

Jesus said to him, (You say to Me), If You can? All things are possible for the one who believes and trusts (in Me)!

Without faith we can’t please God and receive His promises. Yet we can struggle through lack of knowledge of the promises, not asking according to His word and asking in doubt. When we build ourselves up in the scripture and speak the word, we will build up our faith. Don’t give up but keep studying the word until you are fully convinced!