Matthew 4:1 Then was Jesus led up of the Spirit into the wilderness to be tempted of the devil.
There is a multi-dimensional reality that surrounds us, and within which Jesus waged war.
In chapter three we saw the spiritual world physically revealed so those present at the event would know that Jesus not only held supreme authority on earth, but He also rules in the spiritual realm. Throughout the Gospels we read of repeated attempts by spiritual forces to defeat the Christ, and His vigorous struggle against these enemies of heaven.
It is helpful for us to recognize that much of our opposition as Christians is beyond the perception of our physical senses. This is why prayer is so important. We cannot carry on the work of the Lord in our physical strength alone.
Ephesians 6:10 Finally, my brethren, be strong in the Lord, and in the power of his might.
12 For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.