Step 1: Understanding the Concept:
The Bhagavad Gita provides several definitions of Yoga.
Step 2: Detailed Explanation:
In Chapter 2, Verse 48, it is said: ``samatvaṁ yoga ucyate''.
- Samatvam: Equanimity, evenness of mind, or balance.
- Ucyate: Is called.
This means that Yoga is defined as being equanimous in success and failure, pleasure and pain.
Note: ``Yoga is skill in action'' refers to ``yogaḥ karmasu kauśalam'' (2.50).
Step 3: Final Answer:
The statement associated is the practice of equanimity of mind.