Open your mind to new and wise thoughts from a life lived over eighty years. Access the books that initiate you into such thoughts, provided you can forget the author's bad choices. Everyone messes up once in a while.
What you see about you today was started 13.7 billion years ago. Look at the people; they have evolved on this planet, under this sun, which formed as part of the process. And now, believe it or not, you are part of the process.
Did you plant a tree? Did you cut one down to enhance a view? You are a co-creator. For better or worse, that door you installed in your house before it was sold may be there long after you're gone.
Thus you have left your signature on creation. Your descendants, too, are a signature. And don't let me get into the ideas, the customs, the inclinations you've planted.