Tirukkural 476: Know Your Limitations

There will be an end to the life of him who, having climbed out to the end of a branch, ventures to go further.

Image of Satguru Sivaya Subramuniyaswami
The guru helps the devotee to hold his mind in focus, to become pointedly conscious of thought, word and deed, and to cognize the lessons of each experience.
—Gurudeva