A saintly person should learn from the mountain to devote all his efforts to the service of others and to make the welfare of others the sole reason for his existence. Similarly, as the disciple of the tree, he should learn to dedicate himself to others.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
शश्वत्परार्थसर्वेहः परार्थैकान्तसम्भवः । साधुः शिक्षेत भूभृत्तो नगशिष्यः परात्मताम्
śaśvatparārthasarvehaḥ parārthaikāntasambhavaḥ | sādhuḥ śikṣeta bhūbhṛtto nagaśiṣyaḥ parātmatām
SB 11.7.38