Our Scripture reading today is Philippians 4:11-13.
Verse 13, "I can do all things through Christ which strengtheneth me."
The sooner we recognize we are weak and cannot do something, the sooner we are reminded that Jesus Christ desires to help us to do all things.  2 Corinthians 12:10, " Therefore I take pleasure in infirmities, in reproaches, in necessities, in persecutions, in distresses for Christ's sake: for when I am weak, then am I strong."  As a child of God, we will never be just quite strong enough and we will always be in need of the strength of our Heavenly Father.  
When we are living in His strength and walking in His will, there is no limit to what we can accomplish for His glory.  In order to live in His strength, we must ask the Lord for it on a regular basis.  1 Chronicles 16:11, "Seek the LORD and his strength, seek his face continually."  Whatever strength (spiritual, physical, emotional, etc...) you need, God is more than capable of meeting the need.  Claim His strength in your life today!