"Truly I tell you, if you have faith as small as a mustard seed, you can say to this mountain, ‘Move from here to there,’ and it will move. Nothing will be impossible for you.”
MATTHEW 17:20
Faith is the absolute belief that Jesus lived, walked, died and rose again - All in the spirit of the most high God. The faith and love of Jesus is that he took his faith in God - the Father - All the way to death on the cross with the promise that he would rise in 3 days.
His faith was that in his death he would rise and have eternal life and thus give this gift to all that call on him.
Jesus - through the spirit of God - did this for us. Faith in Jesus is knowing that belief in him will overcome everything, because he already defeated the enemy.