Doubt Quote by Baruch Spinoza
“He who has a true idea, knows at that same time that he has a true idea, nor can he doubt concerning the truth of the thing.”
About This Quote
Source Philosophy: Ethics, 1677
A true idea guarantees its own truth, leaving no room for doubt about its reality.
In simple terms: Knowing something true removes doubt.
Trust your insight.
Themes
Mood
Type
When to use this quote
- academic study
- personal decision‑making
- ethical reasoning
Key Concepts
Questions to Reflect On
- How do you verify the truth of an idea?
- Can certainty ever be harmful?
Even true ideas can be misapplied or misunderstood.