Faith comes before understanding, in actual bible lingua, Faith is the understanding,

We already believe on the son of God, so the Good news is we are no different from Caleb, Daniel, Abraham!

By grace are we saved, through FAITH and this FAITH is God's gift to us.

We can stir it up in prayer by speaking aloud to our own hearing all that God has promised! and as our faith is rekindled, Power is stirred.