Panjin T. answered 12/09/20
Mastering Korean: From Beginner to Advanced with Cultural Insights
The truth is 진실. 진실 also has a few other meanings; honesty, fact.
Ex) 진실을 말하세요.
Tell me the truth.
On the other hand, 진리, you probably would not use this word that much in regular conversation. It sounds a little more formal, perhaps used in literature/religious texts.
Ex) 인생의 영원한 진리
The eternal verities of life.
I hope this answer will help your question.