What do you understand by the terms: ‘Perseverance’, ‘Equanimity’ and ‘Utilitarianism’?

What do you understand by the terms: ‘Perseverance’, ‘Equanimity’ and ‘Utilitarianism’? (GS 4)

आप इन शब्दों से क्या समझते हैं: दृढ़ता, समभाव और यूटाइलिटेरियनिसम(उपयोगीता)?

Best Answer: @Da Vinci