There are two words in scripture that answer the question of why we sin. One is found in the Hebrew testament: חָטָא (H2398); the other in Christian testament: ἁμαρτάνω (G264/266). Both of these words have the sense of missing the mark or target, and are translated as “sin”. At the last supper, Jesus prayed this truth: “eternal life means to know you, the only true God, and to know Jesus Christ, whom you sent.” [John 17:3, GNB] It is when we fail to know and love our Heavenly Father with all our heart, soul and mind that we “miss the mark”, and that failed relationship is the foundation of all the manifestations of “sin”. The failed relationship is the root cause–the result is the dysfunctional way we treat ourselves and others.
For this reason, it is absolutely critical that we put our trust in Jesus Christ who has proven by the cross that God will stop at nothing to save us. This is why Peter after describing the Devil as a lion (an opportunistic killer), tells us to “be firm in [our] faith and resist him.” And what is the object (target) of our faith? It can only be Jesus–the one who promised in the Garden of Eden that he would crush the Serpent’s head beneath his heel. [Genesis 3:15] It is only this faith in his ability that will save us from the Adversary and power of sin.
On the cross, it looked to all appearances that Satan had defeated Christ, and there will be times in our lives when it may look like he has defeated us. But as long as we continue to look to our Saviour, he will lift us up after we stumble and fall, and deliver us from the Evil One.
Source: Daily Sabbath School Lessons