Как правильней: "I have always known this" или "I always knew this"?

Вопрос-то нетривиальный. По этому поводу носители определиться не могут, вот, например:
My grammar book says "I always knew I could trust you." means the same
as "I've always known I could trust you." I'm doubtful about this.
I think the first sentense means "I knew I could trust you before, but
now I don't trust you anymore.", and the second one means "I always
trust you no matter what time it is." Am I right? What do you think?

- This is one of those things one either does or doesn't get. In this case
the getting or not-getting depends on a distinction present in some
dialects and absent from others, not on any personal virtue or failing.
In my dialect the present perfect and past simple refer to the same
state of affairs, but to different ways of thinking about it.

Выражения типа "Я всегда это знал", "Я всегда об этом мечтала", "Он всегда так считал" - типичные случаи для Perfect. Т. е. правильный - первый вариант.

2 вариант

Это зависит от контекста.
Вот почитайте, как люди друг другу объясняют эти два варианта (из Google):

I always knew I could trust you.

means the I believed it then and still do--and, more importantly,
there's a connotation that there was some reason that people might
have thought that such trust was misplaced, but you have shown that I
was correct. On the other hand

I always thought I could trust you.

Means that I believed it then, but you have shown me that that trust
was misplaced.

Первый вариант

Оба варианта правильны.

I have always known this

Праильно I am fuck your mommy big ass