Jesus defeated the devil’s temptation as True Man, quoting the written Word of God each time he opposed the devil. The second Adam did this in our place, he defeated the devil for all of us “fallen Adams.”
Thus we understand what the apostle Paul wrote in Romans 5:12,15,17, “12 Therefore, just as sin came into the world through one man (Adam), and death through sin, and so death spread to all men because all sinned… 15… the free gift is not like the trespass. For if many died through one man's trespass, much more have the grace of God and the free gift by the grace of that one man Jesus Christ (the second Adam) abounded for many… 17 For if, because of one man's trespass, death reigned through that one man, much more will those who receive the abundance of grace and the free gift of righteousness reign in life through the one man Jesus Christ.”
The 40 Days of Lent are all about that One Man, the second Adam, Jesus Christ.