Performing virtuous deeds, chanting and paying homage to Buddhas are important.  In addition, to advance the level of practice, it is necessary to do the inner cultivation which involves a long period of training.  This requires the guidance of a real transcendental Vajra Master who can lead an individual to the right path to achieve results. In order to be a student, one has to take refuge and receive initiation empowerment blessing from the Master.     

In Vajrayana, a person who has received the refuge empowerment from a Vajra Master, also becomes a disciple to the Buddha.  This establishes the path of cultivation toward perfect enlightenment.
         

Vajrayana practice places heavy importance on refuge and transmission empowerment from the Guru without which, it is quite impossible to achieve any result.