One of the translations for Tefilla means "attachment".
When we pray, we create a bond between ourselves and our Creator. It connects us. It unites us.
The Zohar explains, that when Yakov had a dream where he saw a ladder standing on the ground and reaching into the heavens and angels going up and down the ladder, the ladder symbolizes - prayer. By way of the ladder of prayer we are able to rise up and elevate ourselves to the highest level.
Prayer, Tefilla, is the link between lower and higher, between earth and heaven between body and soul.
The soul climbs higher and higher: step by step, drawn upwards by its love for G-d, until it becomes fully absorbed in the Light of the Infinite, blessed be He.