【开场】Ladies and gentlemen, good morning/afternoon/evening.
Thank you all for coming.
I am greatly honored to speak to you today.
I'd like to share one of my greatest lessons with you.
我想跟大家分享我一生中最重要的一课。
还可以这样说：
Now, I’d like to share a valuable piece of wisdom with you.
现在，我想跟大家分享一条珍贵的智慧之道。
换句说法：
Now, I'd like to share my favorite saying with you.
现在，我想跟大家分享我最喜欢的一句格言。
【结尾】Thank you for your time and attention.
I hope you enjoyed my speech.
Have a great day!