Tirukkural 786: True Friendship

The love that dwells (merely in the smiles of the face is not friendship; (but) that which dwells deep in the smiles of the heart is true friendship.

Image of Satguru Sivaya Subramuniyaswami
A beautiful practice is to try to sit quietly, visualizing within the lotus within the heart a light, a strong light emanating clearly, a light that is always there.