Dear Khalsa Ji,
Gurbani is Shabadd, it explains what is otherwises unexplainable, it conveys the purpose of our life and tells how to live one's life.
Reading Gurbani again and again and comtemplating over it gives you, progressively, the deeper meaning of the Shabad.
We have to internalise the teachings of Gurbani and incorporate them into our being. When this is really achieved, the individual's thoughts, verbal utterances and physical action all will correspond to the teachings of Gurbani. Such a person's being resonates with gurbani, this individual has realised the spiritual state - 'Waje Shabadd Ghanerai' mentioned in Gurbani. This person becomes a living expression of Gurbani and thus becomes a 'Sikh' (an element of learning) for all others to emulate. Such a person is also referred to as 'Gursikh' i.e. 'Gurmukh'
This is my very personal understanding.
With love and respect for all.
Amarpal Singh