Matt 7:7-8 "Ask and it will be given to you; seek and you will find; knock and the door will be OPENED to you. For EVERYONE who ask receives; the one who seek finds; and to the one who knocks, the door will be opened."
Jesus said "Ask, Seek and Knock" TWO times! When God said it once, you know He meant what He says, it's true enough. When God said the same thing TWICE in a row, you have to really grab the fact that He really meant what He says!
Think about it, how can we knock if the door in our life is already opened?
Sometimes things doesn't come through, or we don't get what we wished because we didn't ask Him, we didn't seek Him enough, we didn't knock God's heart hard enough. We thought He will fed up with us when we keep asking and asking, but I can guarantee, He is a God who loves us to keep bugging Him! He is just one awesome, BEST Daddy that a person can have. :)
Therefore, God reassured us and promised us again...
Psa 34:8 "Taste and see that the Lord is good; blessed is the one who takes refuge in him."