At times, a person can recite the prayers with love, fear and great fervor, without any physical movements. So much so, that it can appear to the casual bystander that he is simply reciting the words of prayer, without any adhesion (Dveikut) to HaShem whatsoever. This is only possible if he is in a state of great adhesion to HaShem, blessed is He. He then will be capable of serving HaShem with the intense love of his soul alone. This kind of service of HaShem is actually much better than prayer that is externally visible in the movement of the body, because it proceeds faster and with much greater adhesion (Dveikut) to HaShem. The external husks of evil (Kelipah) cannot attach themselves to such prayer, for it is entirely inner.