It is imposible to be given the faith of Christ(hearing God) as it works in us to both will and do his good pleasure and not beleive( be saved)
Its not about tasting without eating ..but rather doing the will by believing, receiving the end of our new faith from the beginning.
The example was like to be child like in trusting things not seen. Not childish as a unbeliever.
For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost, And have tasted the good word of God, and the powers of the world to come, If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.Hebrews6