One of the great truths about the God we serve is that he is faithful. From before the creation of the world, before we were a twinkle in our mother's eye, before the fall, he has faithfully loved us.
In our struggle with sin Paul reminds us that, "No temptation has overtaken you except what is common to mankind. And God is faithful; he will not let you be tempted beyond what you can bear. But when you are tempted, he will provide a way out so that you can endure it" (I Corinthians 10:13).
And when we didn't exactly get the victory John says, "If we confess our sins, he is faithful and just and will forgive us our sins and purify us from all unrighteousness" (I John 1:9).
The Lord promised at the fall that the seed of the woman would one day crush the serpents' head. Yesterday was Good Friday and we remembered that Jesus died on the cross, in our place. The enemy thought he had the victory, but tomorrow we remember that Christ rose from the grave, conquering sin and death. Christ fulfilled the promise of the Father, destroying the power of sin and death. That is the foundation of our faith. That is love, that is faithfulness.