God doesn't tell us how He'll answer our prayers, or even when, but He does promise one thing to those who wait on Him- strength. Tony Evens points out that the word wait comes from a Hebrew word used in the making of rope. Every rope starts as a thread, and every thread added just increases it's strength. Getting the idea? Every time you wait on the Lord you add another thread to the rope; you get a little stronger, a little more able to cope. Wait in God's presence.
But waiting isn't always passive, sometimes active; like waiting on a customer and seeing that his or her needs are met. Waiting is not so much a position, it's a focus. Isaiah says, Thou wilt keep him in perfect peace, whose mind is stayed [ focused] on Thee... Isaiah 26:3 KJV. Whether it's sitting prayerfully in God's presence, or actively carrying out his will, you've got His assurance that your strength will be renewed. Listen to these promises:
1) Wait on the Lord; Be of good courage, And He shall strengthen your heart; Wait, I say, on the Lord! ( Psalm 27:14)
2) Wait silently for God alone, For my expectation is from Him (Psalm 62:5)
3) As the eyes of servants look to the hand of their masters... So our eyes look to the Lord our God (Psalm 123 :2)
Need more strength ? Wait on God