I think Tom is optimistic.

Source: Tatoeba

But with the threat of a coronavirus epidemic, things might not look so sunny for Florida tourism.

Source: Tatoeba

Optimists see opportunities in disasters while pessimists find disasters in every opportunity.

Source: Tatoeba

I am an optimist by nature.

Source: Tatoeba

Your view is too optimistic.

Source: Tatoeba

His view seems to be too optimistic.

Source: Tatoeba

Optimism is like the lamp of hope. Pessimism [or negativity] is like a drug of sorrow.

Source: Tatoeba