In Salah and other acts of worship, which have been commanded to us, there are certainly secrets hidden within them; whether we understand these secrets or not is a different matter. Whether we understand the reasoning for these with the eyes of Shari'ah or not, the people of insight [ahl-e-Nazar] know very well the secrets of every act in Salah. This is because their sight is fixated on the Worshipped [Allah] rather than the worship itself. Along with the procedure of Salah, they also learn the reasoning and secrets behind it. This is why the innermost secrets are revealed to them. They then begin to view the esoteric in the same way they view the exoteric.
قال رسول الله صلى الله تعالىٰ عليه و سلم 'الاشارة بالصبع اشد على شيطان من الحديد
عن النبى صلى الله تعلىٰ عليه و سلم قال 'هى مذعرة للشيطان