Certainly! By free will, we choose everyday if we are going to live in God’s grace, or not.
Like a child, who through the day can be both stubborn and cooperative, so we sinners are the same. We can be bullheaded, sin, then seek forgiveness. We likely do this many times a day, in matters great or small.
His Salvation was once and for all, and is available for the taking. We just have to conform ourselves to God’s will to keep it. Fortunately, He is always there to accept our apologies, and encourages us to amend our lives.
That’s the thing about conversion. Accepting responsibility for our faults, feeling true contrition (penitence), and seeking to amend our lives, that’s what conversion is all about. We are called to do that everyday. We were born again in Baptism, and should be born again each day, as we strive to conform ourselves to God’s will, and not our own will.
So, will we have this same free will in Heaven?