Das Glück ist wichtig.

Because Glück is a noun, and all nouns are capitalized in German.

So in this sentence:

• Das = article
• Glück = noun
• ist = verb
• wichtig = adjective

This is one of the first big spelling differences English speakers notice in German.

Because Glück is a neuter noun, so its article is das.

In German, every noun has a grammatical gender:

• der = masculine
• die = feminine
• das = neuter

So you learn the noun together with its article:

• das Glück

The article here is also in the nominative singular, because das Glück is the subject of the sentence.

Here, das is the definite article, meaning the.

So structurally the sentence is:

• Das Glück = the happiness / the luck
• ist = is
• wichtig = important

German often uses an article with nouns in places where English might be more flexible.

Yes, you often can.

Both are possible, but they can feel slightly different:

• Das Glück ist wichtig. = Happiness/The happiness is important.
• Glück ist wichtig. = Happiness/Luck is important.

Without the article, the statement can sound a bit more general or abstract. With das, it may sound more like you are talking about the concept as a whole, or about happiness/luck in a more definite way.

In many everyday situations, both versions are understandable.

Because German main clauses normally follow the verb-second rule.

That means the finite verb goes in the second position:

• Das Glück = first element
• ist = second element
• wichtig = rest of the sentence

So this is standard German word order.

Because the subject is das Glück, which is third person singular, and the verb is sein (to be).

The present-tense forms of sein are:

• ich bin
• du bist
• er/sie/es ist
• wir sind
• ihr seid
• sie/Sie sind

Since das Glück is grammatically like es, the correct form is ist.

Because wichtig is a predicate adjective here, not an adjective directly before a noun.

After verbs like:

• sein = to be
• werden = to become
• bleiben = to stay

German adjectives usually do not take endings.

So:

• Das Glück ist wichtig. ✅
• ein wichtiges Glück ✅

In ein wichtiges Glück, the adjective comes before the noun, so it gets an ending. In Das Glück ist wichtig, it comes after ist, so it stays in its basic form.

Glück is pronounced approximately like glyook, but with a short vowel and rounded lips.

A more accurate guide:

• Gl = like English gl
• ü = a sound English does not really have; say ee while rounding your lips
• ck = a sharp k sound

So Glück is roughly glük.

The vowel is short, so do not stretch it out.

It is:

subject + verb + predicate adjective

So:

• Das Glück = subject
• ist = verb
• wichtig = predicate adjective

This is very similar to English:

• Happiness is important.

So the sentence is grammatically simple and very common in German.

Not always. Glück can mean luck or happiness, depending on context.

For example:

• Ich habe Glück. = I am lucky / I have luck.
• Das Glück ist wichtig. = could mean Happiness is important or Luck is important, depending on the context you were given.

So learners often need to rely on context to know which sense is meant.