Ask and you shall receive
The Grace of God always come in response to prayers asked in faith.
He, that doubts, will not receive anything from our Lord.
Everyone, who came to Jesus with faith and asked of him, was healed.
Every great thing done, as recorded in scriptures, was done by prayers asked in faith.
James said, "If you ask not you will receive not." If anyone lacks anything, let him ask of God in faith and the Lord has promised to answer.
Jesus said "Ask anything in My Name and I will do it."