Isaiah 40:28,29 (KJV)
28 Hast thou not known? hast thou not heard, that the everlasting God, the Lord, the Creator of the ends of the earth, fainteth not, neither is weary? there is no searching of his understanding.
29 He giveth power to the faint; and to them that have no might he increaseth strength.
The Lord gives me strength when I am weak. Even when I am sick, He brings me comfort and peace. How great is His love.