My teacher narrated a nice story yesterday during our tafseer lesson.
He mentioned how once Moosa Alayhis Salaam and Khidr Alayhis Salaam were on a ship. They noticed a bird drinking water from the sea.
Khidr Alayhis Salaam then told Moosa Alayhis Salaam something very true, yet something we do not ponder over enough.
He mentioned that if the knowledge of Moosa Alayhis Salaam and the knowledge of Khidr Alayhis Salaam were put together, it would still not equal even the amount the bird drank from the sea, in comparison to vastness of Allah Subhaanahu wa Ta'aala's knowledge.
It is something to think over, the next time we wonder why so and so thing has happened, or why Allah is not 'accepting' our du'aas, or why we are going through so many trials and tribulations. Trust in Allah Ta'aala's knowledge, because that is our salvation.