Faith is the realization of what is hoped for and evidence of things not seen. Because of it the ancients were well attested.
By faith Abraham, when put to the test, offered up Isaac, and he who had received the promises was ready to offer his only son, of whom it was said,“Through Isaac descendants shall bear your name.” He reasoned that God was able to raise even from the dead, and he received Isaac back as a symbol."
Faith is never a blind leap. Faith is a trust and movement - always a response of the will to God's call. We trust in the certitude that God is always true. Those who choose to walk in faith, walk with God. His faithfulness has been ever present from Abraham to those who seek Him today. Seek the Faith of our Fathers.