Важно верить в себя.

in

Breakdown of Важно верить в себя.

• важный: important
• себе: oneself
• верить: to believe

Questions & Answers about Важно верить в себя.

Why is важно used here instead of важный?

Because важно is not an adjective here. It is a predicative adverb/state word used in an impersonal sentence.

Russian often says things like:

• Важно знать. = It is important to know.
• Трудно понять. = It is hard to understand.
• Полезно читать. = It is useful to read.

So Важно верить в себя literally works like It is important to believe in yourself.

If you used важный, that would be an adjective describing a noun, for example:

• важный человек = an important person
• важный вопрос = an important question

Why is there no subject in this sentence?

Because this is an impersonal construction. Russian very often leaves out the equivalent of English it in sentences like It is important..., It is difficult..., It is necessary...

So:

• Важно верить в себя.
• literally: Important to believe in oneself.
• natural English: It is important to believe in yourself.

Russian does not need a dummy subject like English it here.

Why is верить in the infinitive?