When Paul wrote these words, he did not mean that he was to do all things and then rely on the Lord to find strength. He meant that for all he was told to do by the Lord, he could rely on the Holy Spirit to supply strength. The Lord's strength is discovered in surrender of our own will to His. It is found in allowing our weaknesses to be used for His purposes.
The work of the Holy Spirit has been hindered by our own work. Self-driven work finally wears us thin, and we burn out. Self has driven out the Spirit, and the strength that is offered. The Holy Spirit should not only be our direction, but our strength. We are to yield to Him, and wait for the strength He supplies. Like a tiger waiting to burst upon its prey, our spiritual muscles should be tightly coiled ready to spring into action at a moment's notice. We lie still in anticipatory rest until He has called us forth in His strength.
What does it mean to be still and know that He is God? Those that wait upon the Lord shall not only renew their strength, they shall mount up as eagles. The Lord shall be the wind beneath their wings winging them to new heights. That wind is constant, never wavering of faltering. It is as sure as He is the cornerstone, our foundation. It supports all that we are, and in every way supplies strength for His calling, for our need, for every moment, every concern. That strength is our heartbeat, and we cannot exist without it.When we become tired and fear suddenly closes around our heart, we wait for the Lord until we are joyful again─until His strength has become our own. Our time of anticipatory rest should be one where His strength is renewed. We never seek to work for Him, but only with Him. Discovering that constant wind of His Spirit, we shall be carried to new heights in His strength. If we live with Him and abide in Him, He will open doors for His own purpose in our lives. We will know that in our own weakness, He is strong...that we can do nothing without Him.