Faith is the trust people have in the promises of God and in God Himself. The most powerful thing that builds your faith is the Word of God. If you need a miracle, find an environment where faith is a reality and miracles take place all the time, and stay in that environment even after you receive your healing, as it is possible to lose your healing and/or deliverance. We remember the record in the bible where Jesus said to man who was healed at the pool of Bethesda "Sin no more, lest a worse thing come upon you". Everyone is given a measure of faith, thereafter there is what Dr Siva refers to as the "Baking Process", where you increase your faith by being in the right spiritual environment, and studying the Word. You need to first invest in your faith before you go after your miracle. A miracle environment is one where they go deep into the Word (Word based Church), and the revelation of the Word results in miracles taking place. The evidence of faith in God is works, as the scripture says "Faith without works is dead."