Throughout our daily lives, we interact with many people. The correct way to rely on someone is to treat them as a messenger sent by H'shem and the outcome will depend on Him. In the same vein, we make an effort to bring in a Parnassa, yet are fully aware H'shem decides the success or failure Chas Vishalom, of our endeavors.
Pg 423
Nefesh Hachaim
The righteous would prepare themselves for an hour before Tefillah, to connect themselves to our Father in Heaven and the Shoresh Neshama, the root of all Jewish Neshamot in Shmayim. They would achieve such high levels while praying, their ability to control their limbs would escape them so the Tefillah for H'shem to "open our lips and pray to Him" was instituted at the beginning of the Amida.
Gate Two, Chapter 18 pg103