You will not be told the most important truths. Because no one can tell you. You have to discover them yourself from experience.
People can tell you ideas and information that may be useful. They can articulate versions of their truths. But the truths most important to your life can only be won through piecing together everything you experience, learning patterns, and seeing how they hold up and improve your life and thinking.
There’s no shortcut or book of important truths you can quickly ingest. There’s only living with curiosity, openness, and clear thinking.