It can start with a little butterfly crossing your path.
Then the wonder of sunlight caressing a tree at daybreak. Wandering along a path in a forest. Life is a miracle. Celebrate her in all her forms. Each unique and yet each with a common bond through the miracle of their existence. You are a part of something grand and wonderful and amazing. Fill your heart every day, every moment you can with what you feel for that miracle. And when you do this, you will discover that is a part of you. That is you. As you feel that love and joy for all of those that share this miracle with you, that is what your heart is being filled with. That is what you will become. Something more than you are today. A creature of light and love. I know this sounds like a cliché or dismissive, or perhaps simplistic but there is an answer here. A truth here that shouldn't be dismissed.