'Believing' in the Bible

And Jesus said to him, 'If thou art able to believe! all things are possible to the one that is believing;'

and whoever may cause to stumble one of the little ones believing in me, better is it for him if a millstone is hanged about his neck, and he hath been cast into the sea.

'And signs shall accompany those believing these things; in my name demons they shall cast out; with new tongues they shall speak;