'A'isha reported that the Messenger of Allah (may peace he upon him) used to pronounce while bowing and prostrating himself: All Glorious, All Holy, Lord of the Angels and the Spirit.
The Prophet's example teaches us that we should take time to reflect on Allah's greatness during our prayers. We should not rush through them but instead take time to appreciate His power and mercy towards us. We should also remember that He is always watching over us so we must strive to do good deeds in order to please Him.