Restore to Repentance?

Having been in the church a while, I’ve seen and heard things. This verse has always troubled me:

For it is impossible,

in the case of those:

who have once been enlightened,

who have tasted the heavenly gift,

and have shared in the Holy Spirit,

and have tasted the goodness of the word of God and the powers of the age to come,

and then have fallen away,

to restore them again to repentance,

since they are:

crucifying once again the Son of God to their own harm

and holding him up to contempt.

Hebrews 6:4-6...