Many worldly people strive to gain more and more knowledge, but they'd be wiser if they were just simple. The Lord has to get by all that stuff to get to their heart! The Bible warns, "Beware lest ye be corrupted from the SIMPLICITY that is in Christ!" (2Cor.11:3) Jesus said, "Except ye become as a little CHILD ye shall in no wise enter into the Kingdom of Heaven!" (Mat.18:3) If we'll just recognise that we're just little children, and that we don't know anything, that the LORD is the One Who knows it all, that He is the only One Who is really wise and knows what He's doing, that's being REALLY smart!
The newborn babe does not try to rationalise his mother and father and brothers and sisters and the new World and life around him. He just accepts and enjoys them and starts learning how to live and enjoy life and loved ones. You don't have to personally know all the answers, the whys and wherefores, or be able to explain everything or answer all the questions--just know HIM! He brings you love, He makes your life, He gives you happiness and all you ever wanted and more! What else matters?