Tirukkural 800: Investigation in Forming Friendships

Continue to enjoy the friendship of the pure; (but) renounce even with a gift, the friendship of those who do not agree (with the world).

Image of Satguru Sivaya Subramuniyaswami
But you must remember that even the greatest souls have had nightmares, confusions, heartbreaks, disappointments, losses, desires that have been unfulfilled and experiences that they have not been able to cognize.