I know secrets of healing and of youth, no mere illusions.

我通晓治疗和返老还童的秘密，并不只是幻象。

youdao

This is different than before, but it's not automatically worse. And because I know your secrets, you can't use my secrets as a weapon against me.

这种情况和以往不同，但这种情况并非(自动地)变得(比现在)更差了：因为我知道你的秘密，你就不能把我的秘密当成对付我的武器。

youdao

I know people who tell their secrets to everyone but I like to keep things to myself.

我遇见过喜欢将他们的秘密公之于众的人，然而我宁愿保密。

youdao

"I want to know why he gave away top German army secrets at a press conference, " he said.

BBC: Scharping fights back over flights