The Buddha compared faith to and blind giant who meets up with a very sharp-eyed cripple, called wisdom. The blind giant, called faith, says to the sharp-eyed cripple, "I am very strong, but I can't see; you are very weak, but you have sharp eyes. Come and ride on my shoulders. Together we will go far."
The Buddha never supported blind faith, but a balance between heart and mind, between wisdom and faith. The two together will go far. The saying that blind faith can move mountains omits the fact that, being blind, faith doesn't know which mountain needs moving. That's where wisdom is essential, which means that a thorough understanding of the teaching is essential.
(Ayya Khema 'Where The Iron Eagle Flies')