i have another doubt in this sentence with "son"

one rule is to capitalize any title when used as a direct address.

Jesus is the son of God.

The way that you have it is correct. :)

Jesus christ is the son of god. capitalize

Jesus Christ is the Son of God. (capitalized)

In the sentence you provided "Jesus is the son of God," the word "son" is not capitalized because it is not being used as a direct address. It is simply describing the relationship between Jesus and God. However, if you were to use it as a direct address, then you would capitalize it.

For example:
"Thank you, Son, for your help."

To determine whether a word should be capitalized in a sentence, it's important to understand if it is being used as a direct address or not. If you're still unsure, you can consult a style guide or grammar resource for further guidance.