The sphere where God lives has a very special condition for men to receive what they expect from God, and that is that they must first believe, otherwise they will never be able to receive what they expect from God.
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Jesus said to him: If you can believe, to him who believes everything is possible.
Mark 9:23 King James Version (RVR1960)
Do we want to receive what we expect from God? Jesus gives us the key and says: "If you can believe". To believe we only have to remove doubt and focus exclusively on what God tells us He can give us. Many times we ask God for something that is outside his will, and that is one reason why we also stop receiving, because we do not ask according to God's will.
How can I know the will of God? Simply by knowing his word and aligning my request with the word of God and believing that God will give me what I am asking. Santiago says: "But, ask without hesitation." Unfortunately, those who doubt can never receive what they expect from God, because doubt is the enemy of faith. Doubt kills your faith and you become an incredulous person.
It is very necessary that everyone who approaches God must trust that the heavenly Father listens to him and is at his side. So, everyone who asks God for something must then believe in order to receive.