To gain visibility, one requires two types of lights: the light of the eyes and the external light of the sun or a lamp etc. Then only will one be able to clearly see what is before him. With the absence of any one of the two, one will not be able to see anything and is likely to lose his way or fall into danger.
Likewise, for spiritual guidance and sight, one needs the noor (light) of the heart and the noor (light) of the sunnat. Without any one of them one will create confusion in deen and is very likely to go astray.
One sunnat of Rasullallah (sallallahu ‘alaihi wasallam) is far more superior than a 1000 spiritual states of ecstasy that a person experiences. It is the commitment to the sunnat that will take a person forward. If one holds firm to the sunnat, but does not experience any spiritual state etc. he will be successful. On the other hand, if a person is not committed to the sunnat, but has spiritual experiences then this is not a sign of him being successful.