I hope someone will help me make them sound more natural

[wuzhi]

Hello. I wrote the following words to guide myself. I don’t know how native English speakers say them. I hope someone will help me make them sound more natural.

My mottos
Be good to others
Don’t become overjoyed as to the extent of doing embarrassing things
Be careful and fearless; understand that nothing can hurt you.
Don’t comment other people; understand that all you know is only the tip of an iceberg.
If there is one thing lasting, it must be the soul; the way to enhance the soul is to learn diligently

[Tdol]

Don’t become overjoyed as to the extent of doing embarrassing things- 'Overjoyed' doesn't work here to me- how about 'Don't get carried away and do embarrassing things'
Don’t comment other people; - don't coment on other people- or, maybe better, don't judge other peope.

[wuzhi]

Thank you.

[Tdol]

You're welcome, Wuzhi.