Bhagavad Gita 16.14 is Chapter 16, Verse 14, in Daivasura Sampad Vibhaga Yoga (Divine & Demonic). Below are the Sanskrit text, a transliteration, a plain-English translation and an explanation.
asau mayā hataḥ śatrur haniṣye cāparān api īśvaro 'ham ahaṁ bhogī siddho 'haṁ balavān sukhī
"'That enemy has been slain by me, and others I shall slay too. I am the lord, I am the enjoyer; I am successful, powerful, and happy', "
What This Means:
More demonic thinking: 'I killed that enemy; I'll kill more. I am the lord! I am the enjoyer! I am successful, powerful, happy!' This is the ego inflated to godhood.
Going Deeper:
The ego's supreme inflation: 'asau mayā hataḥ śatruḥ', that enemy slain by me. 'Haniṣye aparān api', I shall slay others too. Then the declarations: 'Īśvaraḥ aham', I am the Lord! 'Aham bhogī', I am the enjoyer! 'Siddhaḥ aham', I am perfected/successful! 'Balavān sukhī', powerful and happy! The ultimate delusion: 'I am God.'
How To Apply This:
Notice when you think 'I am the lord of my domain.' The ego constantly seeks to establish its supremacy. True strength comes from recognizing a power greater than the ego, this is why humility accompanies wisdom.
Key Sanskrit Terms: