Jesus, full of the Holy Spirit, returned from the Jordan, and was led by the Spirit into the wilderness
Forty days ...  There are many examples of men fasting for forty days, and some even longer; and thus there is no reason to suppose any supernatural support of Jesus during this period.  There was indeed supernatural support, but it came afterward.  The number "forty" was significant in Israel's history, that being the number of days Moses fasted  (Deuteronomy 9:9), the time Elijah fasted (1 Kings 19:8), the number of days of uncleanness following childbirth  (Leviticus 12:1-4), and the number of years Egypt was to suffer  (Ezekiel 29:11).