В такую удачу легко верится.

Верится is the impersonal reflexive form of вериться, which is related to верить (to believe).

In this sentence, it means something like:

• it is easy to believe
• one easily believes
• it feels easy to believe

So В такую удачу легко верится is not just a plain factual I believe in such luck, but more a statement about how naturally or easily belief comes.

A very common pattern in Russian is:

• Мне не верится. = I can’t quite believe it.
• Мне легко в это верится. = It’s easy for me to believe this.

So верится often expresses a kind of inner feeling or psychological ease/difficulty.

Because this is an impersonal construction.

Russian often uses impersonal sentences where English would use a dummy subject like it:

• Мне холодно. = I am cold.
• Здесь хорошо работается. = It’s easy/nice to work here.
• В такую удачу легко верится. = It’s easy to believe in such luck.

There is no real subject doing the action. The sentence describes a general state: belief comes easily.

Because верить / вериться in the sense of believe in usually takes в + accusative.

So:

• верить в чудо = to believe in a miracle
• верить в победу = to believe in victory
• верить в удачу = to believe in luck

Here, удача is feminine singular, and after в with this meaning it goes into the accusative:

• nominative: удача
• accusative: удачу

And the adjective has to match it:

• nominative: такая удача
• accusative: такую удачу

Такую is the feminine singular accusative form of такой (such, that kind of).

It agrees with удачу, which is:

• feminine
• singular
• accusative

So:

• такая удача = such luck (nominative)
• в такую удачу = in such luck / in luck like that (accusative after в)

Легко means easily or it is easy.

Here it modifies the whole impersonal predicate:

• легко верится = it is easy to believe

So the sentence means that believing in that kind of luck comes naturally or without much difficulty.

Compare:

• в это легко поверить = it’s easy to believe that
• в это легко верится = it feels easy to believe that

The second one sounds more like a state or tendency, not just a bare logical possibility.

This is an important question.

Верить

This is the normal verb: to believe.

• Я верю в удачу. = I believe in luck.
• Он верит тебе. = He believes you.

It is more direct and straightforward.

Вериться

This is an impersonal/reflexive-style verb that describes whether belief comes easily or not.

• Мне не верится. = I can’t believe it.
• Мне в это верится с трудом. = I find it hard to believe.

So:

• Я верю в такую удачу = I believe in such luck
• В такую удачу легко верится = Such luck is easy to believe in / It’s easy to believe in such luck

The second one focuses on the experience of believing, not just the fact of belief.

Yes, absolutely.

You could say:

• Мне в такую удачу легко верится.

That means:

• It’s easy for me to believe in such luck.

Without мне, the sentence is more general:

• В такую удачу легко верится. = It’s easy to believe in such luck.

So the dative experiencer is simply omitted because the statement is being made in a general way.

Russian has several ways to say something like it’s easy to believe:

• В такую удачу легко верить.
• В такую удачу легко поверить.
• В такую удачу легко верится.

They are similar, but not identical.

легко верить

More general, more neutral:

• it is easy to believe

легко поверить

Often points to a single act of coming to believe:

• it is easy to believe / easy to accept

легко верится

More about the inner feeling:

• one easily believes
• it feels easy to believe
• belief comes naturally

So верится adds a slightly more psychological, impersonal nuance.

The word order is natural, but Russian allows flexibility.

В такую удачу легко верится puts в такую удачу first, which gives it a bit of emphasis as the topic:

• As for such luck, it’s easy to believe in it.

Other possible orders include:

• Легко верится в такую удачу.
• Мне легко верится в такую удачу.

The original version sounds smooth and natural, especially in writing or thoughtful speech.

It is natural Russian, but it sounds a little more bookish or elevated than the plain everyday Я верю...

That is mostly because of the impersonal верится construction. Russian uses this pattern quite a lot, and it is perfectly normal, but it often feels a bit more expressive:

• Мне не спится. = I can’t sleep.
• Мне хорошо работается. = I work well / It’s easy to work.
• Мне не верится. = I can’t believe it.

So the sentence is not strange or archaic, just a little more stylistically expressive than the most basic option.

Yes. Удача means luck, good fortune, or a stroke of luck depending on context.

In в такую удачу, the idea is not abstract luck in general, but luck of that kind / luck that great / luck like that.

So the phrase suggests something like:

• such amazing luck
• luck like that
• that kind of good fortune

That is why the whole sentence can feel slightly emotional or evaluative: the speaker is reacting to a striking kind of luck and saying it is easy to believe in it.

That is a good translation, but it is a little too literal if you want the full nuance.

A more natural English rendering is often:

• It’s easy to believe in such luck.
• Luck like that is easy to believe in.
• One can easily believe in such luck.

The Russian sentence has an impersonal flavor that English usually expresses with it’s easy... rather than a direct word-for-word structure.