There are 3 levels of faith (1) No Faith (2) Little Faith (3) Great Faith
To have great faith, a person is faithful.
Your faith will be increased by the Word. Fill your heart with the Word so that your mouth will be full of the Word.
Do not settle for no, weak, or little faith when you can have GREAT FAITH to use the authority that He has given you to do the same works that Jesus did.