His grace is also great enough to leave the gift lying there for us to accept over and over again.
Ummm ... no ...Hebrews 6:4 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,Look at the apostles, they all rejected the gift one way or another and except for Judas they all came back and accepted the gift again.
5 And have tasted the good word of God, and the powers of the world to come,
6 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.
Can you recall any apostle that did this ?
Peter in his denial. All of them the night of the passion by runnign away and denying knowing Him.
Are you saying once you commit a mortal sin you can never return to God’s grace?
I am guessing you follow the once saved always saved school of thought?
This homily on Hebrews 6 from St John Chrysostom may be of interest to you.
http://www.ccel.org/ccel/schaff/npnf114.v.xiii.html