The Bible compares the man who lives in dependence on God to a tree that draws its sustenance from an underground river (Jeremiah 17:5-8). That is how Jesus lived - perpetually drawing His spiritual resources, as a man, from the Holy Spirit (the river of God).
Jesus' victory over temptation, was not through human determination, but because He drew strength from the Father, moment-by-moment. The way of self-denial as exemplified and taught by Jesus is not one where the soul attempts to master itself. No. That is Buddhism, and yoga, and is as different from the teaching of Scripture as earth is from heaven.
Jesus taught that as human beings we do not have the power to live and serve God as we should. He said that we were like helpless branches entirely dependent on the sap supplied by the tree for fruitfulness. "Apart from Me," He said, "you can do nothing" (John 15:5). And so, what we do manage to do, without the help of the Holy Spirit can be considered to be NOTHING. Herein lies the vital necessity to be "filled with the Spirit continuously" (Ephesians 5:18).
Jesus Himself was filled and anointed with the Holy Spirit (Luke 4:1, 18), and He lived and laboured for His Father in the Spirit's power. But this was possible, only because as a man, He was poor in spirit.
Jesus was conscious of the weakness of the human frame that He had taken on. Therefore, He was perpetually looking for opportunities to get alone and pray. Someone has said that, as tourists look for good hotels and for important sights to be seen, when they enter a city, so Jesus looked for solitary places where He could pray.
He sought for power to overcome temptation and put His soul-power to death. No man was as conscious as Jesus was, of the utter weakness of the flesh, and so He sought the Father's face in prayer for help, as no man ever did. He prayed with "loud crying and tears" in the days of His flesh. The result was that He was mightily strengthened by the Father, much more than any other man. Thus, Jesus never once sinned and never lived out from His soul (Hebrews 4:15; 5:7-9).
Isn't it significant that 25 times in the gospels, the words "pray" or "prayer" are used in connection with Jesus? Therein lay the secret of His life and His labours.
Jesus not only prayed before the great events of His life, but also after some of His great achievements. After feeding the five thousand miraculously, He withdrew into the mountains to pray. This was no doubt to guard against temptations to pride or complacency over the work accomplished, and to renew His strength by waiting on His Father (Isaiah 40:31). We usually pray only before we have some important task to do for the Lord. But if we would develop the habit that Jesus had, of waiting before the Father after we have finished our task, we would preserve ourselves from pride and thus be equipped to do greater things for the Lord.
The busier Jesus' life became, the more He prayed. There were times when He did not have time to eat or even to rest (Mark 3:20; 6:31, 33, 46), but He always took time to pray. He knew when to sleep and when to pray, for He obeyed the promptings of the Spirit.
Poverty of spirit is a prerequisite for effective prayer. Prayer is the expression of human helplessness, and if it is to be meaningful and not a mere ritual, there must be a constant recognition of the inadequacy of human resources either to live the Christian life or to serve God.
Jesus continuously sought for the power of God in prayer, and was never disappointed. Thus He accomplished things through prayer, that even He could not have accomplished in any other way.