Bear calumny, loss, disappointment, defeat boldly and with equanimity, then no mental depression can overwhelm you.
(From : Garland of 1008 Gems, Bhagawan Shri Sathya Sai Baba's Sayings)
It is your duty to ask God. Words must correspond to thought. The thought must be put into true word. It is true that the Divinity knows all, but He requires that the true word is said. The mother may know that to maintain life, child requires food, but the milk is given when the child asks for it.