"And the tempter came and said to Him ..." (Matthew 4:3).
It is not popular today to believe in a literal, personal devil, even among professing Christians. The devil is increasingly seen as being somewhere between a figment of our imagination and a useful device to coerce obedience.
Yet in addition to the name used here ("tempter"), the New Testament gives satan many other names: "ruler of the world" (John 12:31; 14:30; 16:11); "the prince of the power of the air" (Ephesians 2:2); "the god of this world" (2 Corinthians 4:4); "Abaddon" and "Apollyon," both of which mean "destroyer" (Revelation 9:11; and "the serpent of old" (Revelation 12:9).
With these and many other references to the devil in God's infallible Scripture - all of which assume a real, supernatural person - it's clear that satan does exist. And he never made himself more personally manifest than when he confronted Jesus in the wilderness. The Lord's opponent was an actual, personal foe in every sense of that expression.
Since the Fall, satan has directed his full attention and fury against God and His kingdom work. While Christ was on earth, that opposition was particularly intense against the Son and His redemptive mission, beginning at the very outset of His ministry. Yet all the forces of hell continue to present us with real challenges as we endeavor to advance God's kingdom. Thus all believers must remain ever vigilant and prayerful against a genuine spiritual foe.
Have you grown lax in guarding yourself from the "roaring lion" (1 Peter 5:8) who actively seeks to devour you? He is not to be feared, for Your God is triumphant, but he is definitely in need of accounting for. Ask the Lord to make you wise and wary of the enemy's presence.