A mature person clearly grasps that life is fleeting, it ought to be lived here and now, and at the same time, they deeply understand that it needs to be lived fully and worthily.
Eternal values such as freedom, truth, goodness, and beauty are significant precisely because, taken together, they offer every individual the opportunity to live a fulfilling life. Thus, serving these values is a sacred endeavor.
Having felt and acknowledged that life is beautiful, and questions about its origin are secondary, there is only one conclusion — you have found the answers to the main questions of existence. From there on, multiply the good and enjoy life.