O you who believe, fight those [of the disbelievers] who are near to you, from among the disbelieving faculties of your souls, which are the most hostile of your enemies, and let them find harshness in you, that is, a vanquishing and a severity until you attaint the degree of God-fearing so that there then descends upon you assistance from God as He says: and know that God is with the God-fearing.