Sorry, I'm commenting late. This is my perception of the piece.

I'm really impressed how enthused you're to appreciate God in your poems. You effortlessly seem to pen your writes. It's motivating to me and a pointer that you're a spiritually inclined person in the affairs of this life.

This poem delves on how much influence the satan has over mankind. When his whispers subdues man, he rejoices as that's his agenda; to seduce people into his evil kingdom. Hence, hindering off people from the blessings of The Almighty God.
That's being clearly asserted in the 1st 3 lines;
'When the truth is not perceived
The evil devil is relieved
That the grace is not received'.

The last 3 lines;
'So the sentence can't be reprieved
Until reality is believed
That a soul may be relieved'
Further delves on how such satanic influences can get one to incur Gods wrath, thus, His clemency will be hard to be showered upon a sinner.
Nonetheless, only if man can be strong willed in spirit to fight against the whispers of the unseen forces. Then the battle to win the grace and mercy of God can manifest in ones life. With that, a soul will be free from the shackles of the evil spirit. Moreover, God is magnanimous and most merciful.

Lastly, to win the conquest against satan. Man needs to have an unrelenting faith in God, believe in the commandments of His scriptures, imbue His fear in our hearts, be patient and persevere through adversities as trials and tribulations are a blessing in our lives and expiation of our sins.

This is a refreshing read for me in this time of the world, when a lot of occurrences is overwhelmingly gory for one not to ponder over and seek divine intervention for sufferings of all.
A lovely penned poem on life but religiously conceived to me, deep and informative as well.
Keep it up and God bless your efforts.