In the name of God, Most Gracious, Most Merciful
Peace be upon you,
We learn from the Quran that the devil is our most ardent enemy (Quran 36:60), and will do everything in his power to get us off God's path (Quran 7:16-17). The devil is the definition of pure evil, and hence sees no compassion, no kindness, and no mercy. His primary goal in this life is to lead as many humans astray as he can.
The devil's nature is to be sneaky and full of deceit (Quran 7:27). Instead of telling us to disbelieve in God outright, he may try to lure us off the path by telling us to be rude and arrogant (Quran 17:53) or have us believe intoxicants (e.g., wine) in moderation is in fact good for us (Quran 5:90).
[Quran 17:63-65] He said, "Then go; you and those who follow you will end up in Hell as your requital; an equitable requital.
"You may entice them with your voice, and mobilize all your forces and all your men against them, and share in their money and children, and promise them. Anything the devil promises is no more than an illusion.
"As for My servants, you have no power over them." Your Lord suffices as an advocate.
The Devil is the Other Alternative
[Quran 36:60-61] Did I not covenant with you, O Children of Adam, that you shall not worship the devil? That he is your most ardent enemy? And that you shall worship Me alone? This is the right path.
[Quran 37:40] Only GOD's servants who are absolutely devoted to Him alone (will be saved).
[Quran 7:29] Say, "My Lord advocates justice, and to stand devoted to Him alone at every place of worship. You shall devote your worship absolutely to Him alone. Just as He initiated you, you will ultimately go back to Him."
[Quran 6:162-163] Say, "My Contact Prayers (Salat), my worship practices, my life and my death, are all devoted absolutely to GOD alone, the Lord of the universe. He has no partner. This is what I am commanded to believe, and I am the first to submit."
[Mark 12:29-30] The most important one,” answered Jesus, “is this: ‘Hear, O Israel: The Lord our God, the Lord is one. Love the Lord your God with all your heart and with all your soul and with all your mind and with all your strength.’
[Deuteronomy 6:5] You shall love the LORD your God with all your heart and with all your soul and with all your might.
Reference: Tools of the devil