Isaiah 40:31 AMP
But those who wait for the Lord [who expect, look for, and hope in Him] shall change and renew their strength and power; they shall lift their wings and mount up [close to God] as eagles [mount up to the sun]; they shall run and not be weary, they shall walk and not faint or become tired.
I remember in my senior six vacation I sat at home for several months waiting for something to do from which I could earn money. I would wake up every morning and do a few chores around home and watch television the rest of the time. My waiting was passive and surely I stayed home most of the holidays. Towards the end of the holidays I applied to some place and I was called to work there at a time the vacation was about to end. I worked there for one month and left to join my first year at university.
The opening verse was written to the Israelites who were in captivity in Babylon. They were being encouraged to wait on Yahweh, to put their trust in Yahweh. Their waiting was not to be passive but to be active in the Lord by changing their strength, by being expectant and becoming strong in their faith. They were to rise above their current situation by setting their minds on Yahweh who was the only one able to save them. They were not to give up; they were to continue moving on.
This applies so well in our lives today. Imagine a farmer who will not plow and sow their fields claiming to be waiting on God or a student who does not study saying God will give them the ability to do the exams when the exams come.
Therefore, waiting is active and not passive. What are you doing in preparation for what you are waiting for? Apply for that job, study well for that exam and skill yourself. Wait actively.