General aspects of Tibetan Buddhism

From the book "De lama die naar 't westen kwam" (originally in French 'Le Lama venu du Tibet') , by Dagpo Rinpoche, the following interesting details were extracted:

Object of being a monk:

Five objects of study in Lam Rim (the stages to enlightenment) are:

The method (Vadjra) is all the qualities the Buddha has which do not require discrimination: compassion, loving kindness, generosity, patience, enthusiastic perseverance etc. 

Then there is the bell, which symbolizes wisdom: i.e. all the qualities of the Buddha which do require discrimination.