Bhagavad Gita 6.22
यं लब्ध्वा चापरं लाभं मन्यते नाधिकं ततः।
यस्मिन्स्थितो न दुःखेन गुरुणापि विचाल्यते।।6.22।।
Yam labdhva chaparam labham manyate nadhikam tatah
Yasminsthito na duhkhena gurunapi vichalyate
Simple meaning, written by AIHaving obtained it, one thinks no other gain is greater; established in it, one is not moved even by heavy sorrow.