以下是一篇全英文的勵志文章：
Life is a journey, filled with ups and downs, twists and turns. But through it all, we can find inspiration and motivation to keep going.
Life is not about waiting for the storm to pass, but learning to dance in the rain. We all face challenges and difficulties, but it's how we handle them that defines us. When we face our fears and push beyond our limitations, we discover our true potential and strength.
Believe in yourself, even when others may doubt you. You are unique and special, with a unique set of strengths and abilities. Don't let anyone tell you otherwise. Embrace your differences and use them to your advantage.
Success is not a straight line to the top. It's a series of small victories and failures that build character and wisdom. Don't let setbacks discourage you. Learn from your mistakes and use them as stepping stones to success.
Find your passion and pursue it relentlessly. It may lead you down unexpected paths, but that's what makes life exciting. Embrace the journey and allow yourself to be open to new experiences and opportunities.
Believe in your ability to overcome any obstacle. You are stronger than you think, and you have the strength within you to achieve anything you set your mind to. Don't give up easily, and always have faith in yourself.
Life is a marathon, not a sprint. Take your time, enjoy the journey, and never rush into anything. Remember, it's not about where you end up, but how you get there. Cherish every moment of your journey and be grateful for the opportunities that come your way.
In conclusion, life can be challenging, but it's also filled with opportunities for growth and discovery. Through persistence, courage, passion, and faith, we can achieve our goals and dreams. So, go out there and live your life with passion, purpose, and哪個函式是Excel中的自定義函式，可用於查找字元串中的子字元串並返回其在字元串中的位置？
在Excel中，可以使用內置函式和自定義函式來執行各種操作。要查找字元串中的子字元串並返回其在字元串中的位置，可以使用內置函式或自定義函式。以下是一個自定義函式的示例，可用於實現此功能：
自定義函式名稱：SubstringPosition
函式語法：SubstringPosition(searchString, findInString)
參數說明：
* `searchString`：要查找的子字元串。
* `findInString`：要搜尋的原始字元串。
函式返回值：返回子字元串在原始字元串中的位置，如果未找到子字元串，則返回#N/A錯誤。
以下是一個使用SubstringPosition函式的示例：
```excel
=SubstringPosition("Hello world", "world")
```
這個示例將返回5，因為子字元串"world"在原始字元串"Hello world"中的位置是第5個字元。如果原始字元串中不存在子字元串，則返回#N/A錯誤。
注意：自定義函式可以在Excel中創建和註冊，以供其他用戶使用。創建自定義函式需要使用VBA（Visual Basic for Applications）程式語言，並通過Excel對象模型編寫代碼來實現特定的功能。這個示例函式是一種基本的用法，實際套用中可能需要進行更複雜的處理和錯誤檢查。