Use 'believe in' when affirming your conviction about something's existence or its truth, even without proof.

Existence or Truth

It often expresses personal convictions that might not be universally held.

Personal Convictions

Be aware of cultural diversity when discussing what you or others believe in.

'Believe in' can be used to encourage someone by showing confidence in their abilities.

It can emphasize the importance of having confidence in oneself, which is vital for success.

Expressing belief in someone's potential can be a powerful motivator for them.

Here, 'believe in' is about more than just thinking something is true; it's about a commitment to certain values or ideals.

Use it to express support for ideas or principles you're willing to advocate for or defend.

It is often connected with social and political causes one is passionate about.