Isaiah 40:31 - they that wait upon the Lord

[nwink]

"But they that wait upon the LORD shall renew their strength; they shall mount up with wings as eagles; they shall run, and not be weary; and they shall walk, and not faint."

I've heard this verse many times in my life, but thinking about it more recently, I realized I don't understand the verse well in the first place. What does it mean that "they that wait upon the Lord shall renew their strength"? What is the "waiting" and "renewed strength" in view here?

 

[PuritanCovenanter]

From what I have seen, waiting on the Lord has some action associated with it. Like a waitress at a restaurant waits upon her customers so must we wait upon the Lord and in doing so we will be renewed and strengthened. He provides nourishment for the soul and revives and gives grace to the humble and obedient.