Intelligence is what allows us to think, to look for and find the truth using our mind and reason.  Thanks to this capacity, we can understand and learn, imagine and memorize.  We can discover and invent new and great things, making the world better.  But the most important of all, is that thanks to intelligence, we can come to know the truth. 

To know the truth means that what we are thinking coincides with reality. 

For example: If we see a donkey and think: “What I’m seeing is a donkey,” we are in the truth.  But, if we’re somewhat near-sighted and look at the donkey and think that what we’re seeing is a horse, then our sight deceives our intelligence and takes us away from the truth. 

The truth about whether or not it’s a donkey or a horse may not be so important for our life (no one is going to be killed for confusing a donkey with a horse), but there are truths that are very important to know because they affect our entire existence.  They are what we call “transcendental” truths.  These truths respond to questions like: Why am I alive?  Who gave me life?  Why did He give me life?  What does He want from me?  Why do I have to die if I want to live?  Why does evil exist in the world?  Why does suffering exist if I want to be happy? 

Our intelligence allows us to come to know these transcendental truths, but we will only discover them if we spend time and use our intelligence by thinking, studying, and asking questions.  On the other hand, if we spend our life thinking about whether what we see was a donkey or a horse, we will never discover anything transcendental for our life.