Tirukkural 486: Knwoing the Fitting Time

The self-restraint of the energetic (while waiting for a suitable opportunity), is like the drawing back of a fighting-ram in order to butt.

Image of Satguru Sivaya Subramuniyaswami
A satguru is needed because the mind is so cunning and the ego is a self-perpetuating mechanism. It is he who inspires, assists, guides and impels the shishya toward the Self of himself.
—Gurudeva