Matthew 18: 3-4 (Amplified Bible)
And said, Truly I say to you, unless you repent (change, turn about) and become like little children [trusting, lowly, loving, forgiving], you can never enter the kingdom of heaven [at all].
Whoever will humble himself therefore and become like this little child [trusting, lowly, loving, forgiving] is greatest in the kingdom of heaven.
I had a moment of revelation about this concept a few days ago in a conversation with Elena. Someone on some message board somewhere was saying that we need to just do whatever it is that God says and that's that (my poor paraphrase. I have no idea what it actually says but that is what I interpreted him to say). It is easy and probably even taught that in order to have a child-like faith that we should blindly accept whatever God tells us to do and go do it.
How many of you know children that just blindly accept what you tell them without asking one important question: why? Most of the time it isn't out of disrespect or disobedience. A child is trying to understand the purpose of the action and the motivation behind it. By asking 'why', a child learns right from wrong, the place it has in this world, and how things work. They do it, but knowing why they are doing it can create a greater sense of purpose. Doesn't always mean the work will be done with joy... heh.
Why would or should our relationship with our Heavenly Father be any different? We trust Him to guide, teach, and direct us. Knowing why clarifies His vision for our lives.
Just like our earthly parents, God may not explain why because there are occasions if we know why we are doing something we may hesitate and muck it all up.