Those that find this wise
You find happiness by leaning into those things that give you fulfillment. These may be small concepts, these may be large concepts. They may be frequent, they may be rare.
How do you find happiness?
Happiness is a string of moments, not a state of being since happiness is fleeting. To me happiness is spending time doing things that bring me joy, with people that bring me joy. Add to that a job that gives me purpose, and voila! Seems like a simplistic view of happiness but there are things that complicate this simple formula. Responsibilities, taxes, politics, identity, the list goes on. We can use Maslow's hierarchy of needs to extrapolate a lot of things that get in the way of happiness. But to keep this one short, the only way to get closer to happiness is to do something about your current situation.
How do you find truth?
If you don't know the truth about something yet, then it comes by sharing your experiences about that something with others, discussing them and then coming to a consensus. Achieving this involves doing things to test its truthiness. But there's no absolute truth.